diff --git a/go/res/values-az-rAZ/strings.xml b/go/res/values-az-rAZ/strings.xml
deleted file mode 100644
index c4b8cb7..0000000
--- a/go/res/values-az-rAZ/strings.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- 
-/*
-* Copyright (C) 2017 The Android Open Source Project
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
- -->
-
-<resources xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <string name="long_press_widget_to_add" msgid="4001616142797446267">"Qısayolu seçmək üçün toxunub saxlayın."</string>
-    <string name="long_accessible_way_to_add" msgid="2725225828389948328">"Qısayolu seçmək üçün iki dəfə basıb saxlayın və ya fərdi əməliyyatlardan istifadə edin."</string>
-    <string name="widget_button_text" msgid="4221900832360456858">"Qısayollar"</string>
-    <string name="widgets_bottom_sheet_title" msgid="3949835990909395998">"<xliff:g id="NAME">%1$s</xliff:g> qısayolları"</string>
-</resources>
diff --git a/go/res/values-bs-rBA/strings.xml b/go/res/values-bs-rBA/strings.xml
deleted file mode 100644
index 7042468..0000000
--- a/go/res/values-bs-rBA/strings.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- 
-/*
-* Copyright (C) 2017 The Android Open Source Project
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
- -->
-
-<resources xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <string name="long_press_widget_to_add" msgid="4001616142797446267">"Dodirnite i držite da uzmete prečicu."</string>
-    <string name="long_accessible_way_to_add" msgid="2725225828389948328">"Dvaput dodirnite i držite da uzmete prečicu ili koristite prilagođene akcije."</string>
-    <string name="widget_button_text" msgid="4221900832360456858">"Prečice"</string>
-    <string name="widgets_bottom_sheet_title" msgid="3949835990909395998">"Prečice aplikacije <xliff:g id="NAME">%1$s</xliff:g>"</string>
-</resources>
diff --git a/go/res/values-ka-rGE/strings.xml b/go/res/values-ka-rGE/strings.xml
deleted file mode 100644
index 1b46534..0000000
--- a/go/res/values-ka-rGE/strings.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- 
-/*
-* Copyright (C) 2017 The Android Open Source Project
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
- -->
-
-<resources xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <string name="long_press_widget_to_add" msgid="4001616142797446267">"შეეხეთ და დააყოვნეთ მალსახმობის ასარჩევად."</string>
-    <string name="long_accessible_way_to_add" msgid="2725225828389948328">"ორმაგად შეეხეთ და გეჭიროთ მალსახმობის ასარჩევად ან მორგებული მოქმედებების გამოსაყენებლად."</string>
-    <string name="widget_button_text" msgid="4221900832360456858">"მალსახმობები"</string>
-    <string name="widgets_bottom_sheet_title" msgid="3949835990909395998">"<xliff:g id="NAME">%1$s</xliff:g>-ის მალსახმობები"</string>
-</resources>
diff --git a/go/res/values-ky-rKG/strings.xml b/go/res/values-ky-rKG/strings.xml
deleted file mode 100644
index 4c7e973..0000000
--- a/go/res/values-ky-rKG/strings.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- 
-/*
-* Copyright (C) 2017 The Android Open Source Project
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
- -->
-
-<resources xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <string name="long_press_widget_to_add" msgid="4001616142797446267">"Кыска жолду тандоо үчүн басып туруңуз."</string>
-    <string name="long_accessible_way_to_add" msgid="2725225828389948328">"Кыска жолду тандоо үчүн эки жолу таптап, кармап туруңуз же ыңгайлаштырылган аракеттерди колдонуңуз."</string>
-    <string name="widget_button_text" msgid="4221900832360456858">"Кыска жолдор"</string>
-    <string name="widgets_bottom_sheet_title" msgid="3949835990909395998">"<xliff:g id="NAME">%1$s</xliff:g> кыска жол"</string>
-</resources>
diff --git a/go/res/values-lo-rLA/strings.xml b/go/res/values-lo-rLA/strings.xml
deleted file mode 100644
index 7864884..0000000
--- a/go/res/values-lo-rLA/strings.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- 
-/*
-* Copyright (C) 2017 The Android Open Source Project
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
- -->
-
-<resources xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <string name="long_press_widget_to_add" msgid="4001616142797446267">"ແຕະຄ້າງໄວ້ເພື່ອຮັບປຸ່ມລັດ."</string>
-    <string name="long_accessible_way_to_add" msgid="2725225828389948328">"ແຕະສອງເທື່ອຄ້າງໄວ້ເພື່ອຮັບປຸ່ມລັດ ຫຼື ໃຊ້ຄຳສັ່ງແບບກຳນົດເອງ."</string>
-    <string name="widget_button_text" msgid="4221900832360456858">"ປຸ່ມລັດ"</string>
-    <string name="widgets_bottom_sheet_title" msgid="3949835990909395998">"ປຸ່ມລັດ <xliff:g id="NAME">%1$s</xliff:g>"</string>
-</resources>
diff --git a/go/res/values-si-rLK/strings.xml b/go/res/values-si-rLK/strings.xml
deleted file mode 100644
index 4b25c90..0000000
--- a/go/res/values-si-rLK/strings.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- 
-/*
-* Copyright (C) 2017 The Android Open Source Project
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
- -->
-
-<resources xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <string name="long_press_widget_to_add" msgid="4001616142797446267">"කෙටි මගක් තෝරා ගැනීමට ස්පර්ශ කර අල්ලාගෙන සිටින්න."</string>
-    <string name="long_accessible_way_to_add" msgid="2725225828389948328">"විජට් එකක් තෝරා ගැනීමට හෝ අභිරුචි භාවිත කිරීමට දෙවරක් තට්ටු කර අල්ලා ගෙන සිටින්න."</string>
-    <string name="widget_button_text" msgid="4221900832360456858">"කෙටි මං"</string>
-    <string name="widgets_bottom_sheet_title" msgid="3949835990909395998">"කෙටි මං <xliff:g id="NAME">%1$s</xliff:g>"</string>
-</resources>
diff --git a/go/res/values-uz-rUZ/strings.xml b/go/res/values-uz-rUZ/strings.xml
deleted file mode 100644
index 318bc15..0000000
--- a/go/res/values-uz-rUZ/strings.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- 
-/*
-* Copyright (C) 2017 The Android Open Source Project
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*      http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
- -->
-
-<resources xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <string name="long_press_widget_to_add" msgid="4001616142797446267">"Yorliqni tanlab olish uchun bosib turing."</string>
-    <string name="long_accessible_way_to_add" msgid="2725225828389948328">"Ikki marta bosib va bosib turgan holatda yorliqni tanlang yoki maxsus amaldan foydalaning."</string>
-    <string name="widget_button_text" msgid="4221900832360456858">"Yorliqlar"</string>
-    <string name="widgets_bottom_sheet_title" msgid="3949835990909395998">"<xliff:g id="NAME">%1$s</xliff:g> ilovasi yorliqlari"</string>
-</resources>
diff --git a/res/drawable/ic_instant_app_badge.xml b/res/drawable/ic_instant_app_badge.xml
new file mode 100644
index 0000000..cc53230
--- /dev/null
+++ b/res/drawable/ic_instant_app_badge.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2017 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="@dimen/profile_badge_size"
+    android:height="@dimen/profile_badge_size"
+    android:viewportWidth="18"
+    android:viewportHeight="18">
+
+    <path
+        android:fillColor="@android:color/black"
+        android:fillType="evenOdd"
+        android:strokeWidth="1"
+        android:pathData="M 9 0 C 13.9705627485 0 18 4.02943725152 18 9 C 18 13.9705627485 13.9705627485 18 9 18 C 4.02943725152 18 0 13.9705627485 0 9 C 0 4.02943725152 4.02943725152 0 9 0 Z" />
+    <path
+        android:fillColor="@android:color/white"
+        android:fillType="evenOdd"
+        android:strokeWidth="1"
+        android:pathData="M 9 0 C 13.9705627485 0 18 4.02943725152 18 9 C 18 13.9705627485 13.9705627485 18 9 18 C 4.02943725152 18 0 13.9705627485 0 9 C 0 4.02943725152 4.02943725152 0 9 0 Z" />
+    <path
+        android:fillColor="@android:color/white"
+        android:fillType="evenOdd"
+        android:strokeWidth="1"
+        android:pathData="M 9 0 C 13.9705627485 0 18 4.02943725152 18 9 C 18 13.9705627485 13.9705627485 18 9 18 C 4.02943725152 18 0 13.9705627485 0 9 C 0 4.02943725152 4.02943725152 0 9 0 Z" />
+    <path
+        android:fillColor="@android:color/black"
+        android:fillAlpha="0.87"
+        android:fillType="evenOdd"
+        android:strokeWidth="1"
+        android:pathData="M 6 10.4123279 L 8.63934949 10.4123279 L 8.63934949 15.6 L 12.5577168 7.84517705 L 9.94547194 7.84517705 L 9.94547194 2 Z" />
+</vector>
\ No newline at end of file
diff --git a/res/layout/all_apps.xml b/res/layout/all_apps.xml
index 6340619..39df2b1 100644
--- a/res/layout/all_apps.xml
+++ b/res/layout/all_apps.xml
@@ -68,11 +68,10 @@
 
     </com.android.launcher3.allapps.AllAppsRecyclerViewContainerView>
     <View
-        style="@style/AllAppsNavBarProtection"
         android:id="@+id/nav_bar_bg"
+        android:background="?attr/allAppsNavBarScrimColor"
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:layout_gravity="bottom"
-        android:focusable="false"
-        android:visibility="invisible" />
+        android:focusable="false"  />
 </com.android.launcher3.allapps.AllAppsContainerView>
\ No newline at end of file
diff --git a/res/values-v26/styles.xml b/res/values-v26/styles.xml
index fd6fc4d..b25f46a 100644
--- a/res/values-v26/styles.xml
+++ b/res/values-v26/styles.xml
@@ -26,10 +26,4 @@
         <item name="android:colorPrimaryDark">#616161</item> <!-- Gray 700 -->
     </style>
 
-    <!-- From O and above, we show a dark nav bar in all-apps -->
-    <style name="AllAppsNavBarProtection">
-        <item name="android:alpha">0.6</item>
-        <item name="android:background">?android:attr/colorPrimary</item>
-    </style>
-
 </resources>
diff --git a/res/values/attrs.xml b/res/values/attrs.xml
index 7b52dae..68b628f 100644
--- a/res/values/attrs.xml
+++ b/res/values/attrs.xml
@@ -20,6 +20,7 @@
 
     <!-- Attributes used for launcher theme -->
     <attr name="allAppsScrimColor" format="color" />
+    <attr name="allAppsNavBarScrimColor" format="color" />
     <attr name="popupColorPrimary" format="color" />
     <attr name="popupColorSecondary" format="color" />
     <attr name="popupColorTertiary" format="color" />
diff --git a/res/values/config.xml b/res/values/config.xml
index b41172b..10b612b 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -1,7 +1,7 @@
 <resources>
 <!-- Dynamic Grid -->
     <!-- Out of 100, the percent of space the overview bar should try and take vertically. -->
-    <integer name="config_dynamic_grid_overview_icon_zone_percentage">20</integer>
+    <integer name="config_dynamic_grid_overview_icon_zone_percentage">22</integer>
 
 <!-- Miscellaneous -->
     <bool name="config_largeHeap">false</bool>
@@ -116,6 +116,9 @@
     <!-- Name of a color extraction implementation class. -->
     <string name="color_extraction_impl_class" translatable="false"></string>
 
+    <!-- Name of a subclass of com.android.launcher3.util.InstantAppResolver. Can be empty. -->
+    <string name="instant_app_resolver_class" translatable="false"></string>
+
     <!-- Package name of the default wallpaper picker. -->
     <string name="wallpaper_picker_package" translatable="false"></string>
 
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 17bc7f9..5d06705 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -30,6 +30,7 @@
 
     <style name="BaseLauncherThemeWithCustomAttrs" parent="@style/BaseLauncherTheme">
         <item name="allAppsScrimColor">#CCFFFFFF</item>
+        <item name="allAppsNavBarScrimColor">#66FFFFFF</item>
         <item name="popupColorPrimary">#FFF</item>
         <item name="popupColorSecondary">#F5F5F5</item> <!-- Gray 100 -->
         <item name="popupColorTertiary">#E0E0E0</item> <!-- Gray 300 -->
@@ -62,6 +63,7 @@
         <item name="android:colorControlHighlight">#A0FFFFFF</item>
         <item name="android:colorPrimary">#FF333333</item>
         <item name="allAppsScrimColor">#7A000000</item>
+        <item name="allAppsNavBarScrimColor">#80000000</item>
         <item name="popupColorPrimary">?android:attr/colorPrimary</item>
         <item name="popupColorSecondary">#424242</item> <!-- Gray 800 -->
         <item name="popupColorTertiary">#757575</item> <!-- Gray 600 -->
@@ -103,12 +105,6 @@
         <item name="android:includeFontPadding">false</item>
     </style>
 
-    <!-- Style for nav bar background in all-apps screen -->
-    <style name="AllAppsNavBarProtection">
-        <item name="android:alpha">?android:attr/spotShadowAlpha</item>
-        <item name="android:background">@color/default_shadow_color_no_alpha</item>
-    </style>
-
     <!-- Base theme for BubbleTextView and sub classes -->
     <style name="BaseIcon">
         <item name="android:layout_width">match_parent</item>
diff --git a/src/com/android/launcher3/AppInfo.java b/src/com/android/launcher3/AppInfo.java
index 9ec26e2..3da1996 100644
--- a/src/com/android/launcher3/AppInfo.java
+++ b/src/com/android/launcher3/AppInfo.java
@@ -95,10 +95,14 @@
     }
 
     public static Intent makeLaunchIntent(LauncherActivityInfo info) {
+        return makeLaunchIntent(info.getComponentName());
+    }
+
+    public static Intent makeLaunchIntent(ComponentName cn) {
         return new Intent(Intent.ACTION_MAIN)
-            .addCategory(Intent.CATEGORY_LAUNCHER)
-            .setComponent(info.getComponentName())
-            .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
+                .addCategory(Intent.CATEGORY_LAUNCHER)
+                .setComponent(cn)
+                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
     }
 
     @Override
diff --git a/src/com/android/launcher3/BubbleTextView.java b/src/com/android/launcher3/BubbleTextView.java
index a63767c..ac842f9 100644
--- a/src/com/android/launcher3/BubbleTextView.java
+++ b/src/com/android/launcher3/BubbleTextView.java
@@ -184,7 +184,7 @@
     public void applyFromShortcutInfo(ShortcutInfo info, boolean promiseStateChanged) {
         applyIconAndLabel(info.iconBitmap, info);
         setTag(info);
-        if (promiseStateChanged || info.isPromise()) {
+        if (promiseStateChanged || (info.hasPromiseIconUi())) {
             applyPromiseState(promiseStateChanged);
         }
 
@@ -481,7 +481,7 @@
     public void applyPromiseState(boolean promiseStateChanged) {
         if (getTag() instanceof ShortcutInfo) {
             ShortcutInfo info = (ShortcutInfo) getTag();
-            final boolean isPromise = info.isPromise();
+            final boolean isPromise = info.hasPromiseIconUi();
             final int progressLevel = isPromise ?
                     ((info.hasStatusFlag(ShortcutInfo.FLAG_INSTALL_SESSION_ACTIVE) ?
                             info.getInstallProgress() : 0)) : 100;
diff --git a/src/com/android/launcher3/ButtonDropTarget.java b/src/com/android/launcher3/ButtonDropTarget.java
index e4a3226..632e490 100644
--- a/src/com/android/launcher3/ButtonDropTarget.java
+++ b/src/com/android/launcher3/ButtonDropTarget.java
@@ -29,6 +29,7 @@
 import android.graphics.ColorMatrixColorFilter;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -69,6 +70,7 @@
     /** The paint applied to the drag view on hover */
     protected int mHoverColor = 0;
 
+    protected CharSequence mText;
     protected ColorStateList mOriginalTextColor;
     protected Drawable mDrawable;
 
@@ -96,6 +98,7 @@
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
+        mText = getText();
         mOriginalTextColor = getTextColors();
     }
 
@@ -297,4 +300,30 @@
     public int getTextColor() {
         return getTextColors().getDefaultColor();
     }
+
+    /**
+     * Returns True if any update was made.
+     */
+    public boolean updateText(boolean hide) {
+        if ((hide && getText().toString().isEmpty()) || (!hide && mText.equals(getText()))) {
+            return false;
+        }
+
+        setText(hide ? "" : mText);
+        return true;
+    }
+
+    public boolean isTextTruncated() {
+        int availableWidth = getMeasuredWidth();
+        if (mHideParentOnDisable) {
+            ViewGroup parent = (ViewGroup) getParent();
+            availableWidth = parent.getMeasuredWidth() - parent.getPaddingLeft()
+                    - parent.getPaddingRight();
+        }
+        availableWidth -= (getPaddingLeft() + getPaddingRight() + mDrawable.getIntrinsicWidth()
+                + getCompoundDrawablePadding());
+        CharSequence displayedText = TextUtils.ellipsize(mText, getPaint(), availableWidth,
+                TextUtils.TruncateAt.END);
+        return !mText.equals(displayedText);
+    }
 }
diff --git a/src/com/android/launcher3/DeleteDropTarget.java b/src/com/android/launcher3/DeleteDropTarget.java
index 975675a..4dcb64f 100644
--- a/src/com/android/launcher3/DeleteDropTarget.java
+++ b/src/com/android/launcher3/DeleteDropTarget.java
@@ -65,9 +65,11 @@
      * Set the drop target's text to either "Remove" or "Cancel" depending on the drag source.
      */
     public void setTextBasedOnDragSource(DragSource dragSource) {
-        if (!TextUtils.isEmpty(getText())) {
-            setText(dragSource.supportsDeleteDropTarget() ? R.string.remove_drop_target_label
+        if (!TextUtils.isEmpty(mText)) {
+            mText = getResources().getString(dragSource.supportsDeleteDropTarget()
+                    ? R.string.remove_drop_target_label
                     : android.R.string.cancel);
+            requestLayout();
         }
     }
 
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 150bc53..c8e4c49 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -555,9 +555,9 @@
 
     int getOverviewModeButtonBarHeight() {
         int zoneHeight = (int) (overviewModeIconZoneRatio * availableHeightPx);
-        zoneHeight = Math.min(overviewModeMaxIconZoneHeightPx,
-                Math.max(overviewModeMinIconZoneHeightPx, zoneHeight));
-        return zoneHeight;
+        return Utilities.boundToRange(zoneHeight,
+                overviewModeMinIconZoneHeightPx,
+                overviewModeMaxIconZoneHeightPx);
     }
 
     public static int calculateCellWidth(int width, int countX) {
@@ -693,7 +693,8 @@
 
             lp = (FrameLayout.LayoutParams) overviewMode.getLayoutParams();
             lp.width = Math.min(availableWidthPx, maxWidth);
-            lp.height = getOverviewModeButtonBarHeight() + mInsets.bottom;
+            lp.height = getOverviewModeButtonBarHeight();
+            lp.bottomMargin = mInsets.bottom;
             overviewMode.setLayoutParams(lp);
         }
 
diff --git a/src/com/android/launcher3/DropTargetBar.java b/src/com/android/launcher3/DropTargetBar.java
index 0840b70..29a1349 100644
--- a/src/com/android/launcher3/DropTargetBar.java
+++ b/src/com/android/launcher3/DropTargetBar.java
@@ -78,6 +78,58 @@
         setupButtonDropTarget(this, dragController);
     }
 
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
+        boolean hideText = hideTextHelper(false /* shouldUpdateText */, false /* no-op */);
+        if (hideTextHelper(true /* shouldUpdateText */, hideText)) {
+            // Text has changed, so we need to re-measure.
+            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        }
+    }
+
+    /**
+     * Helper method that iterates through the children and returns whether any of the visible
+     * {@link ButtonDropTarget} has truncated text.
+     *
+     * @param shouldUpdateText If True, updates the text of all children.
+     * @param hideText If True and {@param shouldUpdateText} is True, clears the text of all
+     *                 children; otherwise it sets the original text value.
+     *
+     *
+     * @return If shouldUpdateText is True, returns whether any of the children updated their text.
+     *         Else, returns whether any of the children have truncated their text.
+     */
+    private boolean hideTextHelper(boolean shouldUpdateText, boolean hideText) {
+        boolean result = false;
+        View visibleView;
+        ButtonDropTarget dropTarget;
+        for (int i = getChildCount() - 1; i >= 0; --i) {
+            if (getChildAt(i) instanceof ButtonDropTarget) {
+                visibleView = dropTarget = (ButtonDropTarget) getChildAt(i);
+            } else if (getChildAt(i) instanceof ViewGroup) {
+                // The Drop Target is wrapped in a FrameLayout.
+                visibleView = getChildAt(i);
+                dropTarget = (ButtonDropTarget) ((ViewGroup) visibleView).getChildAt(0);
+            } else {
+                // Ignore other views.
+                continue;
+            }
+
+            if (visibleView.getVisibility() == View.VISIBLE) {
+                if (shouldUpdateText) {
+                    result |= dropTarget.updateText(hideText);
+                } else if (dropTarget.isTextTruncated()) {
+                    result = true;
+                    break;
+                }
+            }
+        }
+
+        return result;
+    }
+
     private void setupButtonDropTarget(View view, DragController dragController) {
         if (view instanceof ButtonDropTarget) {
             ButtonDropTarget bdt = (ButtonDropTarget) view;
diff --git a/src/com/android/launcher3/IconCache.java b/src/com/android/launcher3/IconCache.java
index 3bcd7af..6f86954 100644
--- a/src/com/android/launcher3/IconCache.java
+++ b/src/com/android/launcher3/IconCache.java
@@ -47,6 +47,7 @@
 import com.android.launcher3.graphics.LauncherIcons;
 import com.android.launcher3.model.PackageItemInfo;
 import com.android.launcher3.util.ComponentKey;
+import com.android.launcher3.util.InstantAppResolver;
 import com.android.launcher3.util.Preconditions;
 import com.android.launcher3.util.Provider;
 import com.android.launcher3.util.SQLiteCacheHelper;
@@ -94,6 +95,7 @@
     private final LauncherAppsCompat mLauncherApps;
     private final HashMap<ComponentKey, CacheEntry> mCache =
             new HashMap<>(INITIAL_ICON_CACHE_CAPACITY);
+    private final InstantAppResolver mInstantAppResolver;
     private final int mIconDpi;
     @Thunk final IconDB mIconDb;
 
@@ -106,6 +108,7 @@
         mPackageManager = context.getPackageManager();
         mUserManager = UserManagerCompat.getInstance(mContext);
         mLauncherApps = LauncherAppsCompat.getInstance(mContext);
+        mInstantAppResolver = InstantAppResolver.newInstance(mContext);
         mIconDpi = inv.fillResIconDpi;
         mIconDb = new IconDB(context, inv.iconBitmapSize);
 
@@ -575,7 +578,6 @@
         // For icon caching, do not go through DB. Just update the in-memory entry.
         if (entry == null) {
             entry = new CacheEntry();
-            mCache.put(cacheKey, entry);
         }
         if (!TextUtils.isEmpty(title)) {
             entry.title = title;
@@ -583,6 +585,9 @@
         if (icon != null) {
             entry.icon = LauncherIcons.createIconBitmap(icon, mContext);
         }
+        if (!TextUtils.isEmpty(title) && entry.icon != null) {
+            mCache.put(cacheKey, entry);
+        }
     }
 
     private static ComponentKey getPackageKey(String packageName, UserHandle user) {
@@ -619,6 +624,10 @@
                     // only keep the low resolution icon instead of the larger full-sized icon
                     Bitmap icon = LauncherIcons.createBadgedIconBitmap(
                             appInfo.loadIcon(mPackageManager), user, mContext, appInfo.targetSdkVersion);
+                    if (mInstantAppResolver.isInstantApp(appInfo)) {
+                        icon = LauncherIcons.badgeWithDrawable(icon,
+                                mContext.getDrawable(R.drawable.ic_instant_app_badge), mContext);
+                    }
                     Bitmap lowResIcon =  generateLowResIcon(icon);
                     entry.title = appInfo.loadLabel(mPackageManager);
                     entry.contentDescription = mUserManager.getBadgedLabelForUser(entry.title, user);
diff --git a/src/com/android/launcher3/IconProvider.java b/src/com/android/launcher3/IconProvider.java
index 6872515..4dee2b5 100644
--- a/src/com/android/launcher3/IconProvider.java
+++ b/src/com/android/launcher3/IconProvider.java
@@ -2,6 +2,7 @@
 
 import android.content.pm.LauncherActivityInfo;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 
 import java.util.Locale;
 
@@ -17,7 +18,7 @@
     }
 
     public void updateSystemStateString() {
-        mSystemState = Locale.getDefault().toString();
+        mSystemState = Locale.getDefault().toString() + "," + Build.VERSION.SDK_INT;
     }
 
     public String getIconSystemState(String packageName) {
diff --git a/src/com/android/launcher3/InfoDropTarget.java b/src/com/android/launcher3/InfoDropTarget.java
index f088d11..f919dd0 100644
--- a/src/com/android/launcher3/InfoDropTarget.java
+++ b/src/com/android/launcher3/InfoDropTarget.java
@@ -75,7 +75,7 @@
         if (info instanceof AppInfo) {
             componentName = ((AppInfo) info).componentName;
         } else if (info instanceof ShortcutInfo) {
-            componentName = ((ShortcutInfo) info).intent.getComponent();
+            componentName = info.getTargetComponent();
         } else if (info instanceof PendingAddItemInfo) {
             componentName = ((PendingAddItemInfo) info).componentName;
         } else if (info instanceof LauncherAppWidgetInfo) {
diff --git a/src/com/android/launcher3/ItemInfo.java b/src/com/android/launcher3/ItemInfo.java
index c5be096..fa3253c 100644
--- a/src/com/android/launcher3/ItemInfo.java
+++ b/src/com/android/launcher3/ItemInfo.java
@@ -138,17 +138,11 @@
 
     public ComponentName getTargetComponent() {
         Intent intent = getIntent();
-        if (intent == null) {
+        if (intent != null) {
+            return intent.getComponent();
+        } else {
             return null;
         }
-        ComponentName cn = intent.getComponent();
-        if (itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT && cn == null) {
-            // Legacy shortcuts may not have a componentName but just a packageName. In that case
-            // create a dummy componentName instead of adding additional check everywhere.
-            String pkg = intent.getPackage();
-            return pkg == null ? null : new ComponentName(pkg, IconCache.EMPTY_CLASS_NAME);
-        }
-        return cn;
     }
 
     public void writeToValues(ContentWriter writer) {
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 8492a79..614d086 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -113,7 +113,6 @@
 import com.android.launcher3.popup.PopupContainerWithArrow;
 import com.android.launcher3.popup.PopupDataProvider;
 import com.android.launcher3.shortcuts.DeepShortcutManager;
-import com.android.launcher3.shortcuts.ShortcutKey;
 import com.android.launcher3.userevent.nano.LauncherLogProto;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action;
 import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
@@ -121,6 +120,7 @@
 import com.android.launcher3.util.ActivityResultInfo;
 import com.android.launcher3.util.RunnableWithId;
 import com.android.launcher3.util.ComponentKey;
+import com.android.launcher3.util.ComponentKeyMapper;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.launcher3.util.MultiHashMap;
 import com.android.launcher3.util.PackageManagerHelper;
@@ -2424,7 +2424,7 @@
         }
 
         // Check for abandoned promise
-        if ((v instanceof BubbleTextView) && shortcut.isPromise()) {
+        if ((v instanceof BubbleTextView) && shortcut.hasPromiseIconUi()) {
             String packageName = shortcut.intent.getComponent() != null ?
                     shortcut.intent.getComponent().getPackageName() : shortcut.intent.getPackage();
             if (!TextUtils.isEmpty(packageName)) {
@@ -3068,7 +3068,7 @@
      */
     public void tryAndUpdatePredictedApps() {
         if (mLauncherCallbacks != null) {
-            List<ComponentKey> apps = mLauncherCallbacks.getPredictedApps();
+            List<ComponentKeyMapper<AppInfo>> apps = mLauncherCallbacks.getPredictedApps();
             if (apps != null) {
                 mAppsView.setPredictedApps(apps);
             }
diff --git a/src/com/android/launcher3/LauncherCallbacks.java b/src/com/android/launcher3/LauncherCallbacks.java
index d66b14c..c900e53 100644
--- a/src/com/android/launcher3/LauncherCallbacks.java
+++ b/src/com/android/launcher3/LauncherCallbacks.java
@@ -21,7 +21,7 @@
 import android.view.Menu;
 import android.view.View;
 
-import com.android.launcher3.util.ComponentKey;
+import com.android.launcher3.util.ComponentKeyMapper;
 
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
@@ -91,7 +91,7 @@
      */
     boolean shouldMoveToDefaultScreenOnHomeIntent();
     boolean hasSettings();
-    List<ComponentKey> getPredictedApps();
+    List<ComponentKeyMapper<AppInfo>> getPredictedApps();
     int SEARCH_BAR_HEIGHT_NORMAL = 0, SEARCH_BAR_HEIGHT_TALL = 1;
     /** Must return one of {@link #SEARCH_BAR_HEIGHT_NORMAL} or {@link #SEARCH_BAR_HEIGHT_TALL} */
     int getSearchBarHeight();
diff --git a/src/com/android/launcher3/ShortcutInfo.java b/src/com/android/launcher3/ShortcutInfo.java
index f0d9367..adf008b 100644
--- a/src/com/android/launcher3/ShortcutInfo.java
+++ b/src/com/android/launcher3/ShortcutInfo.java
@@ -17,6 +17,7 @@
 package com.android.launcher3;
 
 import android.annotation.TargetApi;
+import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Build;
@@ -59,6 +60,11 @@
     public static final int FLAG_RESTORE_STARTED = 8; //0B1000;
 
     /**
+     * Web UI supported.
+     */
+    public static final int FLAG_SUPPORTS_WEB_UI = 16; //0B10000;
+
+    /**
      * Indicates if it represents a common type mentioned in {@link CommonAppTypeParser}.
      * Upto 15 different types supported.
      */
@@ -188,6 +194,10 @@
         return hasStatusFlag(FLAG_RESTORED_ICON | FLAG_AUTOINSTALL_ICON);
     }
 
+    public boolean hasPromiseIconUi() {
+        return isPromise() && !hasStatusFlag(FLAG_SUPPORTS_WEB_UI);
+    }
+
     public int getInstallProgress() {
         return mInstallProgress;
     }
@@ -226,4 +236,18 @@
     public boolean isDisabled() {
         return isDisabled != 0;
     }
+
+    @Override
+    public ComponentName getTargetComponent() {
+        ComponentName cn = super.getTargetComponent();
+        if (cn == null && (itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT
+                || hasStatusFlag(FLAG_SUPPORTS_WEB_UI))) {
+            // Legacy shortcuts and promise icons with web UI may not have a componentName but just
+            // a packageName. In that case create a dummy componentName instead of adding additional
+            // check everywhere.
+            String pkg = intent.getPackage();
+            return pkg == null ? null : new ComponentName(pkg, IconCache.EMPTY_CLASS_NAME);
+        }
+        return cn;
+    }
 }
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index f8d6498..bdeed4c 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -84,7 +84,6 @@
 import com.android.launcher3.util.LongArrayMap;
 import com.android.launcher3.util.PackageUserKey;
 import com.android.launcher3.util.Thunk;
-import com.android.launcher3.util.VerticalFlingDetector;
 import com.android.launcher3.util.WallpaperOffsetInterpolator;
 import com.android.launcher3.widget.PendingAddShortcutInfo;
 import com.android.launcher3.widget.PendingAddWidgetInfo;
@@ -571,33 +570,6 @@
         }
         // Add the first page
         CellLayout firstPage = insertNewWorkspaceScreen(Workspace.FIRST_SCREEN_ID, 0);
-        if (FeatureFlags.PULLDOWN_SEARCH) {
-            firstPage.setOnTouchListener(new VerticalFlingDetector(mLauncher) {
-                // detect fling when touch started from empty space
-                @Override
-                public boolean onTouch(View v, MotionEvent ev) {
-                    if (workspaceInModalState()) return false;
-                    if (shouldConsumeTouch(v)) return true;
-                    if (super.onTouch(v, ev)) {
-                        mLauncher.startSearch("", false, null, false);
-                        return true;
-                    }
-                    return false;
-                }
-            });
-            firstPage.setOnInterceptTouchListener(new VerticalFlingDetector(mLauncher) {
-                // detect fling when touch started from on top of the icons
-                @Override
-                public boolean onTouch(View v, MotionEvent ev) {
-                    if (shouldConsumeTouch(v)) return true;
-                    if (super.onTouch(v, ev)) {
-                        mLauncher.startSearch("", false, null, false);
-                        return true;
-                    }
-                    return false;
-                }
-            });
-        }
         // Always add a QSB on the first screen.
         if (qsb == null) {
             // In transposed layout, we add the QSB in the Grid. As workspace does not touch the
diff --git a/src/com/android/launcher3/allapps/AllAppsContainerView.java b/src/com/android/launcher3/allapps/AllAppsContainerView.java
index 97a87c1..4eba5c6 100644
--- a/src/com/android/launcher3/allapps/AllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsContainerView.java
@@ -50,6 +50,7 @@
 import com.android.launcher3.keyboard.FocusedItemDecorator;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Target;
 import com.android.launcher3.util.ComponentKey;
+import com.android.launcher3.util.ComponentKeyMapper;
 import com.android.launcher3.util.PackageUserKey;
 
 import java.util.List;
@@ -116,7 +117,7 @@
     /**
      * Sets the current set of predicted apps.
      */
-    public void setPredictedApps(List<ComponentKey> apps) {
+    public void setPredictedApps(List<ComponentKeyMapper<AppInfo>> apps) {
         mApps.setPredictedApps(apps);
     }
 
@@ -349,8 +350,6 @@
             ViewGroup.LayoutParams navBarBgLp = navBarBg.getLayoutParams();
             navBarBgLp.height = insets.bottom;
             navBarBg.setLayoutParams(navBarBgLp);
-            navBarBg.setVisibility(FeatureFlags.LAUNCHER3_GRADIENT_ALL_APPS
-                    ? View.INVISIBLE : View.VISIBLE);
         }
     }
 
diff --git a/src/com/android/launcher3/allapps/AllAppsGridAdapter.java b/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
index ba4fbe0..1f60fcc 100644
--- a/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
+++ b/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
@@ -448,9 +448,20 @@
                 row = Math.abs(numTotalRows - row);
             }
 
-            // We manipulate the stiffness, min, and max values based on the items distance to the
-            // first row and the items distance to the center column to create the ^-shaped motion
-            // effect.
+            calculateSpringValues(spring, row, col);
+        }
+
+        @Override
+        public void setDefaultValues(SpringAnimation spring) {
+            calculateSpringValues(spring, 0, mAppsPerRow / 2);
+        }
+
+        /**
+         * We manipulate the stiffness, min, and max values based on the items distance to the
+         * first row and the items distance to the center column to create the ^-shaped motion
+         * effect.
+         */
+        private void calculateSpringValues(SpringAnimation spring, int row, int col) {
             float rowFactor = (1 + row) * 0.5f;
             float colFactor = getColumnFactor(col, mAppsPerRow);
 
diff --git a/src/com/android/launcher3/allapps/AllAppsTransitionController.java b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
index edfe0c1..a1f2dd7 100644
--- a/src/com/android/launcher3/allapps/AllAppsTransitionController.java
+++ b/src/com/android/launcher3/allapps/AllAppsTransitionController.java
@@ -7,6 +7,7 @@
 import android.animation.ArgbEvaluator;
 import android.animation.ObjectAnimator;
 import android.graphics.Color;
+import android.support.animation.SpringAnimation;
 import android.support.v4.graphics.ColorUtils;
 import android.support.v4.view.animation.FastOutSlowInInterpolator;
 import android.view.MotionEvent;
@@ -101,6 +102,7 @@
     private AnimatorSet mDiscoBounceAnimation;
     private GradientView mGradientView;
 
+    private SpringAnimation mSearchSpring;
     private SpringAnimationHandler mSpringAnimationHandler;
 
     public AllAppsTransitionController(Launcher l) {
@@ -226,6 +228,7 @@
                 }
                 mLauncher.showAppsView(true /* animated */, false /* updatePredictedApps */);
                 if (hasSpringAnimationHandler()) {
+                    mSpringAnimationHandler.add(mSearchSpring, true /* setDefaultValues */);
                     // The icons are moving upwards, so we go to 0 from 1. (y-axis 1 is below 0.)
                     mSpringAnimationHandler.animateToFinalPosition(0 /* pos */, 1 /* startValue */);
                 }
@@ -499,6 +502,7 @@
     public void finishPullUp() {
         mHotseat.setVisibility(View.INVISIBLE);
         if (hasSpringAnimationHandler()) {
+            mSpringAnimationHandler.remove(mSearchSpring);
             mSpringAnimationHandler.reset();
         }
         setProgress(0f);
@@ -544,6 +548,7 @@
                 mWorkspace.getPageIndicator().getCaretDrawable(), mLauncher);
         mAppsView.getSearchUiManager().addOnScrollRangeChangeListener(this);
         mSpringAnimationHandler = mAppsView.getSpringAnimationHandler();
+        mSearchSpring = mAppsView.getSearchUiManager().getSpringForFling();
     }
 
     private boolean hasSpringAnimationHandler() {
diff --git a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
index 5e7a5ca..6bbe3ea 100644
--- a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
+++ b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
@@ -29,6 +29,7 @@
 import com.android.launcher3.discovery.AppDiscoveryItem;
 import com.android.launcher3.discovery.AppDiscoveryUpdateState;
 import com.android.launcher3.util.ComponentKey;
+import com.android.launcher3.util.ComponentKeyMapper;
 import com.android.launcher3.util.LabelComparator;
 
 import java.util.ArrayList;
@@ -173,7 +174,7 @@
     // The set of sections that we allow fast-scrolling to (includes non-merged sections)
     private final List<FastScrollSectionInfo> mFastScrollerSections = new ArrayList<>();
     // The set of predicted app component names
-    private final List<ComponentKey> mPredictedAppComponents = new ArrayList<>();
+    private final List<ComponentKeyMapper<AppInfo>> mPredictedAppComponents = new ArrayList<>();
     // The set of predicted apps resolved from the component names and the current set of apps
     private final List<AppInfo> mPredictedApps = new ArrayList<>();
     private final List<AppDiscoveryAppInfo> mDiscoveredApps = new ArrayList<>();
@@ -298,20 +299,20 @@
         updateAdapterItems();
     }
 
-    private List<AppInfo> processPredictedAppComponents(List<ComponentKey> components) {
+    private List<AppInfo> processPredictedAppComponents(List<ComponentKeyMapper<AppInfo>> components) {
         if (mComponentToAppMap.isEmpty()) {
             // Apps have not been bound yet.
             return Collections.emptyList();
         }
 
         List<AppInfo> predictedApps = new ArrayList<>();
-        for (ComponentKey ck : components) {
-            AppInfo info = mComponentToAppMap.get(ck);
+        for (ComponentKeyMapper<AppInfo> mapper : components) {
+            AppInfo info = mapper.getItem(mComponentToAppMap);
             if (info != null) {
                 predictedApps.add(info);
             } else {
                 if (FeatureFlags.IS_DOGFOOD_BUILD) {
-                    Log.e(TAG, "Predicted app not found: " + ck);
+                    Log.e(TAG, "Predicted app not found: " + mapper);
                 }
             }
             // Stop at the number of predicted apps
@@ -331,7 +332,7 @@
      * If the number of predicted apps is the same as the previous list of predicted apps,
      * we can optimize by swapping them in place.
      */
-    public void setPredictedApps(List<ComponentKey> apps) {
+    public void setPredictedApps(List<ComponentKeyMapper<AppInfo>> apps) {
         mPredictedAppComponents.clear();
         mPredictedAppComponents.addAll(apps);
 
@@ -472,14 +473,14 @@
 
         if (DEBUG_PREDICTIONS) {
             if (mPredictedAppComponents.isEmpty() && !mApps.isEmpty()) {
-                mPredictedAppComponents.add(new ComponentKey(mApps.get(0).componentName,
-                        Process.myUserHandle()));
-                mPredictedAppComponents.add(new ComponentKey(mApps.get(0).componentName,
-                        Process.myUserHandle()));
-                mPredictedAppComponents.add(new ComponentKey(mApps.get(0).componentName,
-                        Process.myUserHandle()));
-                mPredictedAppComponents.add(new ComponentKey(mApps.get(0).componentName,
-                        Process.myUserHandle()));
+                mPredictedAppComponents.add(new ComponentKeyMapper<AppInfo>(new ComponentKey(mApps.get(0).componentName,
+                        Process.myUserHandle())));
+                mPredictedAppComponents.add(new ComponentKeyMapper<AppInfo>(new ComponentKey(mApps.get(0).componentName,
+                        Process.myUserHandle())));
+                mPredictedAppComponents.add(new ComponentKeyMapper<AppInfo>(new ComponentKey(mApps.get(0).componentName,
+                        Process.myUserHandle())));
+                mPredictedAppComponents.add(new ComponentKeyMapper<AppInfo>(new ComponentKey(mApps.get(0).componentName,
+                        Process.myUserHandle())));
             }
         }
 
@@ -644,8 +645,8 @@
         return result;
     }
 
-    public AppInfo findApp(ComponentKey key) {
-        return mComponentToAppMap.get(key);
+    public AppInfo findApp(ComponentKeyMapper<AppInfo> mapper) {
+        return mapper.getItem(mComponentToAppMap);
     }
 
     /**
diff --git a/src/com/android/launcher3/allapps/SearchUiManager.java b/src/com/android/launcher3/allapps/SearchUiManager.java
index c0d7850..34230e0 100644
--- a/src/com/android/launcher3/allapps/SearchUiManager.java
+++ b/src/com/android/launcher3/allapps/SearchUiManager.java
@@ -15,6 +15,8 @@
  */
 package com.android.launcher3.allapps;
 
+import android.support.animation.SpringAnimation;
+import android.support.annotation.NonNull;
 import android.view.KeyEvent;
 
 /**
@@ -28,6 +30,11 @@
     void initialize(AlphabeticalAppsList appsList, AllAppsRecyclerView recyclerView);
 
     /**
+     * A {@link SpringAnimation} that will be used when the user flings.
+     */
+    @NonNull SpringAnimation getSpringForFling();
+
+    /**
      * Notifies the search manager that the apps-list has changed and the search UI should be
      * updated accordingly.
      */
diff --git a/src/com/android/launcher3/allapps/search/AppsSearchContainerLayout.java b/src/com/android/launcher3/allapps/search/AppsSearchContainerLayout.java
index d504551..ddf6e58 100644
--- a/src/com/android/launcher3/allapps/search/AppsSearchContainerLayout.java
+++ b/src/com/android/launcher3/allapps/search/AppsSearchContainerLayout.java
@@ -17,6 +17,9 @@
 
 import android.content.Context;
 import android.graphics.Rect;
+import android.support.animation.FloatValueHolder;
+import android.support.animation.SpringAnimation;
+import android.support.animation.SpringForce;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.text.Selection;
@@ -62,6 +65,8 @@
     private View mDivider;
     private HeaderElevationController mElevationController;
 
+    private SpringAnimation mSpring;
+
     public AppsSearchContainerLayout(Context context) {
         this(context, null);
     }
@@ -81,6 +86,9 @@
 
         mSearchQueryBuilder = new SpannableStringBuilder();
         Selection.setSelection(mSearchQueryBuilder, 0);
+
+        // Note: This spring does nothing.
+        mSpring = new SpringAnimation(new FloatValueHolder()).setSpring(new SpringForce(0));
     }
 
     @Override
@@ -127,6 +135,11 @@
     }
 
     @Override
+    public @NonNull SpringAnimation getSpringForFling() {
+        return mSpring;
+    }
+
+    @Override
     public void refreshSearchResult() {
         mSearchBarController.refreshSearchResult();
     }
diff --git a/src/com/android/launcher3/anim/SpringAnimationHandler.java b/src/com/android/launcher3/anim/SpringAnimationHandler.java
index 3e58adc..eec3a48 100644
--- a/src/com/android/launcher3/anim/SpringAnimationHandler.java
+++ b/src/com/android/launcher3/anim/SpringAnimationHandler.java
@@ -70,6 +70,20 @@
     }
 
     /**
+     * Adds a spring to the list of springs handled by this class.
+     * @param spring The new spring to be added.
+     * @param setDefaultValues If True, sets the spring to the default
+     *                         {@link AnimationFactory} values.
+     */
+    public void add(SpringAnimation spring, boolean setDefaultValues) {
+        if (setDefaultValues) {
+            mAnimationFactory.setDefaultValues(spring);
+        }
+        spring.setStartVelocity(mCurrentVelocity);
+        mAnimations.add(spring);
+    }
+
+    /**
      * Adds a new or recycled animation to the list of springs handled by this class.
      *
      * @param view The view the spring is attached to.
@@ -82,15 +96,17 @@
             view.setTag(R.id.spring_animation_tag, spring);
         }
         mAnimationFactory.update(spring, object);
-        spring.setStartVelocity(mCurrentVelocity);
-        mAnimations.add(spring);
+        add(spring, false /* setDefaultValues */);
     }
 
     /**
      * Stops and removes the spring attached to {@param view}.
      */
     public void remove(View view) {
-        SpringAnimation animation = (SpringAnimation) view.getTag(R.id.spring_animation_tag);
+        remove((SpringAnimation) view.getTag(R.id.spring_animation_tag));
+    }
+
+    public void remove(SpringAnimation animation) {
         if (animation.canSkipToEnd()) {
             animation.skipToEnd();
         }
@@ -226,6 +242,11 @@
          * Updates the value of {@param spring} based on {@param object}.
          */
         void update(SpringAnimation spring, T object);
+
+        /**
+         * Sets the factory default values for the given {@param spring}.
+         */
+        void setDefaultValues(SpringAnimation spring);
     }
 
     /**
diff --git a/src/com/android/launcher3/config/BaseFlags.java b/src/com/android/launcher3/config/BaseFlags.java
index 6a4cbcb..c88359b 100644
--- a/src/com/android/launcher3/config/BaseFlags.java
+++ b/src/com/android/launcher3/config/BaseFlags.java
@@ -52,8 +52,6 @@
     public static final boolean QSB_ON_FIRST_SCREEN = true;
     // When enabled the all-apps icon is not added to the hotseat.
     public static final boolean NO_ALL_APPS_ICON = true;
-    // When enabled fling down gesture on the first workspace triggers search.
-    public static final boolean PULLDOWN_SEARCH = false;
     // When enabled the status bar may show dark icons based on the top of the wallpaper.
     public static final boolean LIGHT_STATUS_BAR = false;
     // When enabled, icons not supporting {@link AdaptiveIconDrawable} will be wrapped in {@link FixedScaleDrawable}.
diff --git a/src/com/android/launcher3/graphics/LauncherIcons.java b/src/com/android/launcher3/graphics/LauncherIcons.java
index d955674..7c80c30 100644
--- a/src/com/android/launcher3/graphics/LauncherIcons.java
+++ b/src/com/android/launcher3/graphics/LauncherIcons.java
@@ -38,6 +38,7 @@
 import android.support.annotation.Nullable;
 
 import com.android.launcher3.AppInfo;
+import com.android.launcher3.FastBitmapDrawable;
 import com.android.launcher3.IconCache;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.R;
@@ -192,13 +193,16 @@
      * Adds the {@param badge} on top of {@param srcTgt} using the badge dimensions.
      */
     public static Bitmap badgeWithBitmap(Bitmap srcTgt, Bitmap badge, Context context) {
+        return badgeWithDrawable(srcTgt, new FastBitmapDrawable(badge), context);
+    }
+
+    public static Bitmap badgeWithDrawable(Bitmap srcTgt, Drawable badge, Context context) {
         int badgeSize = context.getResources().getDimensionPixelSize(R.dimen.profile_badge_size);
         synchronized (sCanvas) {
             sCanvas.setBitmap(srcTgt);
-            sCanvas.drawBitmap(badge, new Rect(0, 0, badge.getWidth(), badge.getHeight()),
-                    new Rect(srcTgt.getWidth() - badgeSize,
-                            srcTgt.getHeight() - badgeSize, srcTgt.getWidth(), srcTgt.getHeight()),
-                    new Paint(Paint.FILTER_BITMAP_FLAG));
+            int iconSize = srcTgt.getWidth();
+            badge.setBounds(iconSize - badgeSize, iconSize - badgeSize, iconSize, iconSize);
+            badge.draw(sCanvas);
             sCanvas.setBitmap(null);
         }
         return srcTgt;
diff --git a/src/com/android/launcher3/model/CacheDataUpdatedTask.java b/src/com/android/launcher3/model/CacheDataUpdatedTask.java
index 7a27741..0139bd9 100644
--- a/src/com/android/launcher3/model/CacheDataUpdatedTask.java
+++ b/src/com/android/launcher3/model/CacheDataUpdatedTask.java
@@ -88,7 +88,7 @@
             case OP_CACHE_UPDATE:
                 return true;
             case OP_SESSION_UPDATE:
-                return si.isPromise();
+                return si.hasPromiseIconUi();
             default:
                 return false;
         }
diff --git a/src/com/android/launcher3/model/LoaderTask.java b/src/com/android/launcher3/model/LoaderTask.java
index c56325a..4756edc 100644
--- a/src/com/android/launcher3/model/LoaderTask.java
+++ b/src/com/android/launcher3/model/LoaderTask.java
@@ -431,6 +431,10 @@
                                 }
                             }
 
+                            if ((c.restoreFlag & ShortcutInfo.FLAG_SUPPORTS_WEB_UI) != 0) {
+                                validTarget = false;
+                            }
+
                             if (validTarget) {
                                 // The shortcut points to a valid target (either no target
                                 // or something which is ready to be used)
diff --git a/src/com/android/launcher3/model/PackageInstallStateChangedTask.java b/src/com/android/launcher3/model/PackageInstallStateChangedTask.java
index 1e0af68..32dfe25 100644
--- a/src/com/android/launcher3/model/PackageInstallStateChangedTask.java
+++ b/src/com/android/launcher3/model/PackageInstallStateChangedTask.java
@@ -16,6 +16,9 @@
 package com.android.launcher3.model;
 
 import android.content.ComponentName;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.os.Process;
 
 import com.android.launcher3.AllAppsList;
 import com.android.launcher3.AppInfo;
@@ -28,6 +31,7 @@
 import com.android.launcher3.ShortcutInfo;
 import com.android.launcher3.compat.PackageInstallerCompat;
 import com.android.launcher3.compat.PackageInstallerCompat.PackageInstallInfo;
+import com.android.launcher3.util.InstantAppResolver;
 
 import java.util.ArrayList;
 import java.util.HashSet;
@@ -46,6 +50,17 @@
     @Override
     public void execute(LauncherAppState app, BgDataModel dataModel, AllAppsList apps) {
         if (mInstallInfo.state == PackageInstallerCompat.STATUS_INSTALLED) {
+            try {
+                // For instant apps we do not get package-add. Use setting events to update
+                // any pinned icons.
+                ApplicationInfo ai = app.getContext()
+                        .getPackageManager().getApplicationInfo(mInstallInfo.packageName, 0);
+                if (InstantAppResolver.newInstance(app.getContext()).isInstantApp(ai)) {
+                    app.getModel().onPackageAdded(ai.packageName, Process.myUserHandle());
+                }
+            } catch (PackageManager.NameNotFoundException e) {
+                // Ignore
+            }
             // Ignore install success events as they are handled by Package add events.
             return;
         }
@@ -94,7 +109,7 @@
                 if (info instanceof ShortcutInfo) {
                     ShortcutInfo si = (ShortcutInfo) info;
                     ComponentName cn = si.getTargetComponent();
-                    if (si.isPromise() && (cn != null)
+                    if (si.hasPromiseIconUi() && (cn != null)
                             && mInstallInfo.packageName.equals(cn.getPackageName())) {
                         si.setInstallProgress(mInstallInfo.progress);
                         if (mInstallInfo.state == PackageInstallerCompat.STATUS_FAILED) {
diff --git a/src/com/android/launcher3/model/PackageUpdatedTask.java b/src/com/android/launcher3/model/PackageUpdatedTask.java
index 6c78d5b..13962a2 100644
--- a/src/com/android/launcher3/model/PackageUpdatedTask.java
+++ b/src/com/android/launcher3/model/PackageUpdatedTask.java
@@ -23,6 +23,7 @@
 import android.os.UserHandle;
 import android.util.ArrayMap;
 import android.util.Log;
+
 import com.android.launcher3.AllAppsList;
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.IconCache;
@@ -32,7 +33,6 @@
 import com.android.launcher3.LauncherAppWidgetInfo;
 import com.android.launcher3.LauncherModel.CallbackTask;
 import com.android.launcher3.LauncherModel.Callbacks;
-import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.SessionCommitReceiver;
 import com.android.launcher3.ShortcutInfo;
@@ -46,6 +46,7 @@
 import com.android.launcher3.util.LongArrayMap;
 import com.android.launcher3.util.PackageManagerHelper;
 import com.android.launcher3.util.PackageUserKey;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -104,6 +105,7 @@
                         SessionCommitReceiver.queueAppIconAddition(context, packages[i], mUser);
                     }
                 }
+                flagOp = FlagOp.removeFlag(ShortcutInfo.FLAG_DISABLED_NOT_AVAILABLE);
                 break;
             }
             case OP_UPDATE:
@@ -170,12 +172,12 @@
             }
         }
 
+        final LongArrayMap<Boolean> removedShortcuts = new LongArrayMap<>();
+
         // Update shortcut infos
         if (mOp == OP_ADD || flagOp != FlagOp.NO_OP) {
             final ArrayList<ShortcutInfo> updatedShortcuts = new ArrayList<>();
-            final LongArrayMap<Boolean> removedShortcuts = new LongArrayMap<>();
             final ArrayList<LauncherAppWidgetInfo> widgets = new ArrayList<>();
-
             synchronized (dataModel) {
                 for (ItemInfo info : dataModel.itemsIdMap) {
                     if (info instanceof ShortcutInfo && mUser.equals(info.user)) {
@@ -197,6 +199,13 @@
                         if (cn != null && matcher.matches(si, cn)) {
                             AppInfo appInfo = addedOrUpdatedApps.get(cn);
 
+                            if (si.hasStatusFlag(ShortcutInfo.FLAG_SUPPORTS_WEB_UI)) {
+                                removedShortcuts.put(si.id, false);
+                                if (mOp == OP_REMOVE) {
+                                    continue;
+                                }
+                            }
+
                             // For system apps, package manager send OP_UPDATE when an
                             // app is enabled.
                             if (si.isPromise() && (mOp == OP_ADD || mOp == OP_UPDATE)) {
@@ -213,23 +222,20 @@
                                             appInfo = addedOrUpdatedApps.get(cn);
                                         }
 
-                                        if ((intent == null) || (appInfo == null)) {
+                                        if (intent != null && appInfo != null) {
+                                            si.intent = intent;
+                                            si.status = ShortcutInfo.DEFAULT;
+                                            infoUpdated = true;
+                                        } else if (si.hasPromiseIconUi()) {
                                             removedShortcuts.put(si.id, true);
                                             continue;
                                         }
-                                        si.intent = intent;
                                     }
                                 }
-
-                                si.status = ShortcutInfo.DEFAULT;
-                                infoUpdated = true;
-                                if (si.itemType == Favorites.ITEM_TYPE_APPLICATION) {
-                                    iconCache.getTitleAndIcon(si, si.usingLowResIcon);
-                                }
                             }
 
-                            if (appInfo != null && Intent.ACTION_MAIN.equals(si.intent.getAction())
-                                    && si.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION) {
+                            if ((mOp == OP_ADD || mOp == OP_UPDATE) &&
+                                    si.itemType == Favorites.ITEM_TYPE_APPLICATION) {
                                 iconCache.getTitleAndIcon(si, si.usingLowResIcon);
                                 infoUpdated = true;
                             }
@@ -308,7 +314,8 @@
 
         if (!removedPackages.isEmpty() || !removedComponents.isEmpty()) {
             ItemInfoMatcher removeMatch = ItemInfoMatcher.ofPackages(removedPackages, mUser)
-                    .or(ItemInfoMatcher.ofComponents(removedComponents, mUser));
+                    .or(ItemInfoMatcher.ofComponents(removedComponents, mUser))
+                    .and(ItemInfoMatcher.ofItemIds(removedShortcuts, true));
             deleteAndBindComponentsRemoved(removeMatch);
 
             // Remove any queued items from the install queue
diff --git a/src/com/android/launcher3/shortcuts/DeepShortcutManager.java b/src/com/android/launcher3/shortcuts/DeepShortcutManager.java
index 5ce78dc..f44f5c8 100644
--- a/src/com/android/launcher3/shortcuts/DeepShortcutManager.java
+++ b/src/com/android/launcher3/shortcuts/DeepShortcutManager.java
@@ -66,7 +66,7 @@
 
     public static boolean supportsShortcuts(ItemInfo info) {
         boolean isItemPromise = info instanceof com.android.launcher3.ShortcutInfo
-                && ((com.android.launcher3.ShortcutInfo) info).isPromise();
+                && ((com.android.launcher3.ShortcutInfo) info).hasPromiseIconUi();
         return info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION
                 && !info.isDisabled() && !isItemPromise;
     }
diff --git a/src/com/android/launcher3/testing/LauncherExtension.java b/src/com/android/launcher3/testing/LauncherExtension.java
index 8d43518..e5842fa 100644
--- a/src/com/android/launcher3/testing/LauncherExtension.java
+++ b/src/com/android/launcher3/testing/LauncherExtension.java
@@ -11,6 +11,7 @@
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherCallbacks;
 import com.android.launcher3.util.ComponentKey;
+import com.android.launcher3.util.ComponentKeyMapper;
 
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
@@ -197,7 +198,7 @@
         }
 
         @Override
-        public List<ComponentKey> getPredictedApps() {
+        public List<ComponentKeyMapper<AppInfo>> getPredictedApps() {
             // To debug app predictions, enable AlphabeticalAppsList#DEBUG_PREDICTIONS
             return new ArrayList<>();
         }
diff --git a/src/com/android/launcher3/util/ComponentKeyMapper.java b/src/com/android/launcher3/util/ComponentKeyMapper.java
new file mode 100644
index 0000000..916176a
--- /dev/null
+++ b/src/com/android/launcher3/util/ComponentKeyMapper.java
@@ -0,0 +1,50 @@
+package com.android.launcher3.util;
+
+/**
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.support.annotation.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+public class ComponentKeyMapper<T> {
+
+    protected final ComponentKey mComponentKey;
+
+    public ComponentKeyMapper(ComponentKey key) {
+        this.mComponentKey = key;
+    }
+
+    public @Nullable T getItem(Map<ComponentKey, T> map) {
+        return map.get(mComponentKey);
+    }
+
+    public String getPackage() {
+        return mComponentKey.componentName.getPackageName();
+    }
+
+    public String getComponentClass() {
+        return mComponentKey.componentName.getClassName();
+    }
+
+    @Override
+    public String toString() {
+        return mComponentKey.toString();
+    }
+
+}
diff --git a/src/com/android/launcher3/util/InstantAppResolver.java b/src/com/android/launcher3/util/InstantAppResolver.java
new file mode 100644
index 0000000..e60d768
--- /dev/null
+++ b/src/com/android/launcher3/util/InstantAppResolver.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.util;
+
+import android.content.Context;
+import android.content.pm.ApplicationInfo;
+
+import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * A wrapper class to access instant app related APIs.
+ */
+public class InstantAppResolver {
+
+    public static InstantAppResolver newInstance(Context context) {
+        return Utilities.getOverrideObject(
+                InstantAppResolver.class, context, R.string.instant_app_resolver_class);
+    }
+
+    public boolean isInstantApp(ApplicationInfo info) {
+        return false;
+    }
+
+    public List<ApplicationInfo> getInstantApps() {
+        return Collections.emptyList();
+    }
+}
diff --git a/src/com/android/launcher3/util/VerticalFlingDetector.java b/src/com/android/launcher3/util/VerticalFlingDetector.java
deleted file mode 100644
index 7236c2d..0000000
--- a/src/com/android/launcher3/util/VerticalFlingDetector.java
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.launcher3.util;
-
-import android.content.Context;
-import android.view.MotionEvent;
-import android.view.VelocityTracker;
-import android.view.View;
-import android.view.ViewConfiguration;
-
-public class VerticalFlingDetector implements View.OnTouchListener {
-
-    private static final float CUSTOM_SLOP_MULTIPLIER = 2.2f;
-    private static final int SEC_IN_MILLIS = 1000;
-
-    private VelocityTracker mVelocityTracker;
-    private float mMinimumFlingVelocity;
-    private float mMaximumFlingVelocity;
-    private float mDownX, mDownY;
-    private boolean mShouldCheckFling;
-    private double mCustomTouchSlop;
-
-    public VerticalFlingDetector(Context context) {
-        ViewConfiguration vc = ViewConfiguration.get(context);
-        mMinimumFlingVelocity = vc.getScaledMinimumFlingVelocity();
-        mMaximumFlingVelocity = vc.getScaledMaximumFlingVelocity();
-        mCustomTouchSlop = CUSTOM_SLOP_MULTIPLIER * vc.getScaledTouchSlop();
-    }
-
-    @Override
-    public boolean onTouch(View v, MotionEvent ev) {
-        if (mVelocityTracker == null) {
-            mVelocityTracker = VelocityTracker.obtain();
-        }
-        mVelocityTracker.addMovement(ev);
-        switch (ev.getAction()) {
-            case MotionEvent.ACTION_DOWN:
-                mDownX = ev.getX();
-                mDownY = ev.getY();
-                mShouldCheckFling = false;
-                break;
-            case MotionEvent.ACTION_MOVE:
-                if (mShouldCheckFling) {
-                    break;
-                }
-                if (Math.abs(ev.getY() - mDownY) > mCustomTouchSlop &&
-                        Math.abs(ev.getY() - mDownY) > Math.abs(ev.getX() - mDownX)) {
-                    mShouldCheckFling = true;
-                }
-                break;
-            case MotionEvent.ACTION_UP:
-                if (mShouldCheckFling) {
-                    mVelocityTracker.computeCurrentVelocity(SEC_IN_MILLIS, mMaximumFlingVelocity);
-                    // only when fling is detected in down direction
-                    if (mVelocityTracker.getYVelocity() > mMinimumFlingVelocity) {
-                        cleanUp();
-                        return true;
-                    }
-                }
-                // fall through.
-            case MotionEvent.ACTION_CANCEL:
-                cleanUp();
-        }
-        return false;
-    }
-
-    private void cleanUp() {
-        if (mVelocityTracker == null) {
-            return;
-        }
-        mVelocityTracker.recycle();
-        mVelocityTracker = null;
-    }
-}