diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/QuickSwitchTouchController.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/QuickSwitchTouchController.java
index 9e53959..c643858 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/QuickSwitchTouchController.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/touchcontrollers/QuickSwitchTouchController.java
@@ -35,8 +35,6 @@
 
 import android.view.MotionEvent;
 
-import androidx.annotation.Nullable;
-
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.Utilities;
@@ -57,7 +55,7 @@
  */
 public class QuickSwitchTouchController extends AbstractStateChangeTouchController {
 
-    private @Nullable TaskView mTaskToLaunch;
+    protected final RecentsView mOverviewPanel;
 
     public QuickSwitchTouchController(Launcher launcher) {
         this(launcher, SingleAxisSwipeDetector.HORIZONTAL);
@@ -65,6 +63,7 @@
 
     protected QuickSwitchTouchController(Launcher l, SingleAxisSwipeDetector.Direction dir) {
         super(l, dir);
+        mOverviewPanel = l.getOverviewPanel();
     }
 
     @Override
@@ -94,7 +93,6 @@
     public void onDragStart(boolean start, float startDisplacement) {
         super.onDragStart(start, startDisplacement);
         mStartContainerType = LauncherLogProto.ContainerType.NAVBAR;
-        mTaskToLaunch = mLauncher.<RecentsView>getOverviewPanel().getTaskViewAt(0);
         ActivityManagerWrapper.getInstance()
                 .closeSystemWindows(CLOSE_SYSTEM_WINDOWS_REASON_RECENTS);
     }
@@ -102,7 +100,6 @@
     @Override
     protected void onSwipeInteractionCompleted(LauncherState targetState, int logAction) {
         super.onSwipeInteractionCompleted(targetState, logAction);
-        mTaskToLaunch = null;
     }
 
     @Override
@@ -141,13 +138,15 @@
     }
 
     private void updateFullscreenProgress(float progress) {
-        if (mTaskToLaunch != null) {
-            mTaskToLaunch.setFullscreenProgress(progress);
-            int sysuiFlags = progress > UPDATE_SYSUI_FLAGS_THRESHOLD
-                    ? mTaskToLaunch.getThumbnail().getSysUiStatusNavFlags()
-                    : 0;
-            mLauncher.getSystemUiController().updateUiState(UI_STATE_OVERVIEW, sysuiFlags);
+        mOverviewPanel.setFullscreenProgress(progress);
+        int sysuiFlags = 0;
+        if (progress > UPDATE_SYSUI_FLAGS_THRESHOLD) {
+            TaskView tv = mOverviewPanel.getTaskViewAt(0);
+            if (tv != null) {
+                sysuiFlags = tv.getThumbnail().getSysUiStatusNavFlags();
+            }
         }
+        mLauncher.getSystemUiController().updateUiState(UI_STATE_OVERVIEW, sysuiFlags);
     }
 
     @Override
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherSwipeHandler.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherSwipeHandler.java
index 1f78857..633bd13 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherSwipeHandler.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherSwipeHandler.java
@@ -1081,9 +1081,10 @@
 
     private void continueComputingRecentsScrollIfNecessary() {
         if (!mGestureState.hasState(STATE_RECENTS_SCROLLING_FINISHED)
-                && !mStateCallback.hasStates(STATE_HANDLER_INVALIDATED)) {
+                && !mStateCallback.hasStates(STATE_HANDLER_INVALIDATED)
+                && !mCanceled) {
             computeRecentsScrollIfInvisible();
-            mRecentsView.post(this::continueComputingRecentsScrollIfNecessary);
+            mRecentsView.postOnAnimation(this::continueComputingRecentsScrollIfNecessary);
         }
     }
 
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java
index 617a840..97652aa 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java
@@ -669,7 +669,7 @@
             mContextualChip.setScaleY(0f);
             GradientDrawable scrimDrawable = (GradientDrawable) getResources().getDrawable(
                     R.drawable.chip_scrim_gradient, mActivity.getTheme());
-            float cornerRadius = TaskCornerRadius.get(mActivity);
+            float cornerRadius = getTaskCornerRadius();
             scrimDrawable.setCornerRadii(
                     new float[]{0, 0, 0, 0, cornerRadius, cornerRadius, cornerRadius,
                             cornerRadius});
@@ -688,6 +688,10 @@
         }
     }
 
+    public float getTaskCornerRadius() {
+        return TaskCornerRadius.get(mActivity);
+    }
+
     /**
      * Clears the contextual chip from TaskView.
      *
diff --git a/quickstep/res/layout/overview_actions_container.xml b/quickstep/res/layout/overview_actions_container.xml
index e163991..1ecec25 100644
--- a/quickstep/res/layout/overview_actions_container.xml
+++ b/quickstep/res/layout/overview_actions_container.xml
@@ -35,6 +35,7 @@
         </Space>
         <Button
             android:id="@+id/action_screenshot"
+            android:theme="@style/ThemeControlHighlightWorkspaceColor"
             style="@style/OverviewActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -48,6 +49,7 @@
 
         <Button
             android:id="@+id/action_share"
+            android:theme="@style/ThemeControlHighlightWorkspaceColor"
             style="@style/OverviewActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
diff --git a/quickstep/res/values/styles.xml b/quickstep/res/values/styles.xml
index 3926988..c97ee7c 100644
--- a/quickstep/res/values/styles.xml
+++ b/quickstep/res/values/styles.xml
@@ -69,6 +69,14 @@
         <item name="android:textColor">@color/gesture_tutorial_primary_color</item>
     </style>
 
+    <!--
+      Can be applied to views to color things like ripples and list highlights the workspace text
+      color.
+    -->
+    <style name="ThemeControlHighlightWorkspaceColor">
+        <item name="android:colorControlHighlight">?attr/workspaceTextColor</item>
+    </style>
+
     <style name="OverviewActionButton"
         parent="@android:style/Widget.DeviceDefault.Button.Borderless">
         <item name="android:textColor">?attr/workspaceTextColor</item>
diff --git a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
index 3bb8b07..10e3a28 100644
--- a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
+++ b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
@@ -252,13 +252,10 @@
         super.onActivityFlagsChanged(changeBits);
     }
 
-    /**
-     * Sets the back button visibility based on the current state/window focus.
-     */
-    private void onLauncherStateOrFocusChanged() {
+    public boolean shouldBackButtonBeHidden(LauncherState toState) {
         Mode mode = SysUINavigationMode.getMode(this);
         boolean shouldBackButtonBeHidden = mode.hasGestures
-                && getStateManager().getState().hasFlag(FLAG_HIDE_BACK_BUTTON)
+                && toState.hasFlag(FLAG_HIDE_BACK_BUTTON)
                 && hasWindowFocus()
                 && (getActivityFlags() & ACTIVITY_STATE_TRANSITION_ACTIVE) == 0;
         if (shouldBackButtonBeHidden) {
@@ -266,6 +263,14 @@
             shouldBackButtonBeHidden = AbstractFloatingView.getTopOpenViewWithType(this,
                     TYPE_ALL & ~TYPE_HIDE_BACK_BUTTON) == null;
         }
+        return shouldBackButtonBeHidden;
+    }
+
+    /**
+     * Sets the back button visibility based on the current state/window focus.
+     */
+    private void onLauncherStateOrFocusChanged() {
+        boolean shouldBackButtonBeHidden = shouldBackButtonBeHidden(getStateManager().getState());
         UiThreadHelper.setBackButtonAlphaAsync(this, SET_BACK_BUTTON_ALPHA,
                 shouldBackButtonBeHidden ? 0f : 1f, true /* animate */);
         if (getDragLayer() != null) {
diff --git a/quickstep/src/com/android/launcher3/statehandlers/BackButtonAlphaHandler.java b/quickstep/src/com/android/launcher3/statehandlers/BackButtonAlphaHandler.java
index 9145191..075a483 100644
--- a/quickstep/src/com/android/launcher3/statehandlers/BackButtonAlphaHandler.java
+++ b/quickstep/src/com/android/launcher3/statehandlers/BackButtonAlphaHandler.java
@@ -61,7 +61,7 @@
 
         mBackAlpha.value = SystemUiProxy.INSTANCE.get(mLauncher).getLastBackButtonAlpha();
         animation.setFloat(mBackAlpha, VALUE,
-                toState.hasFlag(FLAG_HIDE_BACK_BUTTON) ? 0 : 1, LINEAR);
+                mLauncher.shouldBackButtonBeHidden(toState) ? 0 : 1, LINEAR);
     }
 
     private void updateBackAlpha() {
diff --git a/quickstep/src/com/android/quickstep/RecentsAnimationDeviceState.java b/quickstep/src/com/android/quickstep/RecentsAnimationDeviceState.java
index ef14e28..8ac15e8 100644
--- a/quickstep/src/com/android/quickstep/RecentsAnimationDeviceState.java
+++ b/quickstep/src/com/android/quickstep/RecentsAnimationDeviceState.java
@@ -17,6 +17,7 @@
 
 import static android.content.Intent.ACTION_USER_UNLOCKED;
 
+import static com.android.launcher3.util.DefaultDisplay.CHANGE_ALL;
 import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
 import static com.android.quickstep.SysUINavigationMode.Mode.NO_BUTTON;
 import static com.android.quickstep.SysUINavigationMode.Mode.THREE_BUTTONS;
@@ -216,6 +217,7 @@
         mDefaultDisplay.removeChangeListener(this);
         if (newMode.hasGestures) {
             mDefaultDisplay.addChangeListener(this);
+            onDisplayInfoChanged(mDefaultDisplay.getInfo(), CHANGE_ALL);
         }
 
         if (newMode == NO_BUTTON) {
diff --git a/quickstep/src/com/android/quickstep/util/RecentsOrientedState.java b/quickstep/src/com/android/quickstep/util/RecentsOrientedState.java
index 5ca2095..b36c4ef 100644
--- a/quickstep/src/com/android/quickstep/util/RecentsOrientedState.java
+++ b/quickstep/src/com/android/quickstep/util/RecentsOrientedState.java
@@ -350,7 +350,11 @@
         } else {
             outPivot.set(fullWidth, fullHeight);
         }
-        final float scale = Math.min(outPivot.x / taskView.width(), outPivot.y / taskView.height());
+        float scale = Math.min(outPivot.x / taskView.width(), outPivot.y / taskView.height());
+        // We also scale the preview as part of fullScreenParams, so account for that as well.
+        if (fullWidth > 0) {
+            scale = scale * dp.widthPx / fullWidth;
+        }
 
         if (scale == 1) {
             outPivot.set(fullWidth / 2, fullHeight / 2);
diff --git a/src/com/android/launcher3/DropTarget.java b/src/com/android/launcher3/DropTarget.java
index 0a0f9ad..6cb803a 100644
--- a/src/com/android/launcher3/DropTarget.java
+++ b/src/com/android/launcher3/DropTarget.java
@@ -25,6 +25,8 @@
 import com.android.launcher3.dragndrop.DragView;
 import com.android.launcher3.dragndrop.DraggableView;
 import com.android.launcher3.folder.FolderNameProvider;
+import com.android.launcher3.logging.InstanceId;
+import com.android.launcher3.logging.InstanceIdSequence;
 import com.android.launcher3.model.data.ItemInfo;
 
 /**
@@ -75,6 +77,11 @@
          * DragView represents. May be an actual View class or a virtual stand-in */
         public DraggableView originalView = null;
 
+        /** Used for matching DROP event with its corresponding DRAG event on the server side. */
+        final InstanceId mLogInstanceId =
+                new InstanceIdSequence(1 << 20 /*InstanceId.INSTANCE_ID_MAX*/)
+                    .newInstanceId();
+
         public DragObject(Context context) {
             if (FeatureFlags.FOLDER_NAME_SUGGEST.get()) {
                 folderNameProvider = FolderNameProvider.newInstance(context);
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 2111162..dd00bd3 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -248,6 +248,8 @@
     // Handles workspace state transitions
     private final WorkspaceStateTransitionAnimation mStateTransitionAnimation;
 
+    private final StatsLogManager mStatsLogManager;
+
     /**
      * Used to inflate the Workspace from XML.
      *
@@ -280,6 +282,7 @@
         // Disable multitouch across the workspace/all apps/customize tray
         setMotionEventSplittingEnabled(true);
         setOnTouchListener(new WorkspaceTouchListener(mLauncher, this));
+        mStatsLogManager = StatsLogManager.newInstance(context);
     }
 
     @Override
@@ -359,7 +362,7 @@
     }
 
     @Override
-    public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) {
+    public void onDragStart(DragObject dragObject, DragOptions options) {
         if (ENFORCE_DRAG_EVENT_ORDER) {
             enforceDragParity("onDragStart", 0, 0);
         }
@@ -411,10 +414,10 @@
 
         // Always enter the spring loaded mode
         mLauncher.getStateManager().goToState(SPRING_LOADED);
-        StatsLogManager.newInstance(getContext())
-                .log(
-                    LauncherEvent.LAUNCHER_ITEM_DRAG_STARTED,
-                    dragObject.originalDragInfo.buildProto(null));
+        mStatsLogManager.log(
+                LauncherEvent.LAUNCHER_ITEM_DRAG_STARTED,
+                dragObject.mLogInstanceId,
+                dragObject.originalDragInfo.buildProto(null));
     }
 
     public void deferRemoveExtraEmptyScreen() {
@@ -1695,6 +1698,7 @@
     @Override
     public void prepareAccessibilityDrop() { }
 
+    @Override
     public void onDrop(final DragObject d, DragOptions options) {
         mDragViewVisualCenter = d.getVisualCenter(mDragViewVisualCenter);
         CellLayout dropTargetLayout = mDropToLayout;
@@ -1886,6 +1890,10 @@
         if (d.stateAnnouncer != null && !droppedOnOriginalCell) {
             d.stateAnnouncer.completeAction(R.string.item_moved);
         }
+        mStatsLogManager.log(
+                LauncherEvent.LAUNCHER_ITEM_DROP_COMPLETED,
+                d.mLogInstanceId,
+                d.dragInfo.buildProto(null));
     }
 
     public void onNoCellFound(View dropTargetLayout) {
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index ffe106f..78d194b 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -92,6 +92,7 @@
     public static final BooleanFlag ENABLE_QUICKSTEP_LIVE_TILE = getDebugFlag(
             "ENABLE_QUICKSTEP_LIVE_TILE", false, "Enable live tile in Quickstep overview");
 
+    // Keep as DeviceFlag to allow remote disable in emergency.
     public static final BooleanFlag ENABLE_SUGGESTED_ACTIONS_OVERVIEW = new DeviceFlag(
             "ENABLE_SUGGESTED_ACTIONS_OVERVIEW", false, "Show chip hints on the overview screen");
 
@@ -139,8 +140,9 @@
             "ENABLE_OVERVIEW_ACTIONS", true, "Show app actions instead of the shelf in Overview."
             + " As part of this decoupling, also distinguish swipe up from nav bar vs above it.");
 
-    public static final BooleanFlag ENABLE_SELECT_MODE = getDebugFlag(
-            "ENABLE_SELECT_MODE", true, "Show Select Mode button in Overview Actions");
+    // Keep as DeviceFlag for remote disable in emergency.
+    public static final BooleanFlag ENABLE_OVERVIEW_SELECTIONS = new DeviceFlag(
+            "ENABLE_OVERVIEW_SELECTIONS", true, "Show Select Mode button in Overview Actions");
 
     public static final BooleanFlag ENABLE_DATABASE_RESTORE = getDebugFlag(
             "ENABLE_DATABASE_RESTORE", true,
diff --git a/src/com/android/launcher3/logging/InstanceId.java b/src/com/android/launcher3/logging/InstanceId.java
new file mode 100644
index 0000000..e720d75
--- /dev/null
+++ b/src/com/android/launcher3/logging/InstanceId.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2020 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.logging;
+
+import static java.lang.Math.max;
+import static java.lang.Math.min;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+
+
+/**
+ * An opaque identifier used to disambiguate which logs refer to a particular instance of some
+ * UI element. Useful when there might be multiple instances simultaneously active.
+ * Obtain from InstanceIdSequence.  Clipped to range [0, INSTANCE_ID_MAX].
+ *
+ * Copy of frameworks/base/core/java/com/android/internal/logging/InstanceId.java.
+ */
+public final class InstanceId implements Parcelable {
+    // At most 20 bits: ~1m possibilities, ~0.5% probability of collision in 100 values
+    static final int INSTANCE_ID_MAX = 1 << 20;
+
+    private final int mId;
+    InstanceId(int id) {
+        mId = min(max(0, id), INSTANCE_ID_MAX);
+    }
+
+    private InstanceId(Parcel in) {
+        this(in.readInt());
+    }
+
+    @VisibleForTesting
+    public int getId() {
+        return mId;
+    }
+
+    @NonNull
+    @Override
+    public String toString() {
+        return mId + "";
+    }
+
+    /**
+     * Create a fake instance ID for testing purposes.  Not for production use. See also
+     * InstanceIdSequenceFake, which is a testing replacement for InstanceIdSequence.
+     * @param id The ID you want to assign.
+     * @return new InstanceId.
+     */
+    @VisibleForTesting
+    public static InstanceId fakeInstanceId(int id) {
+        return new InstanceId(id);
+    }
+
+    @Override
+    public int hashCode() {
+        return mId;
+    }
+
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (!(obj instanceof InstanceId)) {
+            return false;
+        }
+        return mId == ((InstanceId) obj).mId;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel out, int flags) {
+        out.writeInt(mId);
+    }
+
+    public static final Parcelable.Creator<InstanceId> CREATOR =
+            new Parcelable.Creator<InstanceId>() {
+                @Override
+                public InstanceId createFromParcel(Parcel in) {
+                    return new InstanceId(in);
+                }
+
+                @Override
+                public InstanceId[] newArray(int size) {
+                    return new InstanceId[size];
+                }
+            };
+
+}
diff --git a/src/com/android/launcher3/logging/InstanceIdSequence.java b/src/com/android/launcher3/logging/InstanceIdSequence.java
new file mode 100644
index 0000000..a4b7953
--- /dev/null
+++ b/src/com/android/launcher3/logging/InstanceIdSequence.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2020 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.logging;
+
+import static java.lang.Math.max;
+import static java.lang.Math.min;
+
+import androidx.annotation.VisibleForTesting;
+
+import java.security.SecureRandom;
+import java.util.Random;
+
+/**
+ * Generates random InstanceIds in range [1, instanceIdMax] for passing to
+ * UiEventLogger.logWithInstanceId(). Holds a SecureRandom, which self-seeds on first use; try to
+ * give it a long lifetime. Safe for concurrent use.
+ *
+ * Copy of frameworks/base/core/java/com/android/internal/logging/InstanceIdSequence.java
+ */
+public class InstanceIdSequence {
+    protected final int mInstanceIdMax;
+    private final Random mRandom = new SecureRandom();
+
+    /**
+     * Constructs a sequence with identifiers [1, instanceIdMax].  Capped at INSTANCE_ID_MAX.
+     * @param instanceIdMax Limiting value of identifiers. Normally positive: otherwise you get
+     *                      an all-1 sequence.
+     */
+    public InstanceIdSequence(int instanceIdMax) {
+        mInstanceIdMax = min(max(1, instanceIdMax), InstanceId.INSTANCE_ID_MAX);
+    }
+
+    /**
+     * Gets the next instance from the sequence.  Safe for concurrent use.
+     * @return new InstanceId
+     */
+    public InstanceId newInstanceId() {
+        return newInstanceIdInternal(1 + mRandom.nextInt(mInstanceIdMax));
+    }
+
+    /**
+     * Factory function for instance IDs, used for testing.
+     * @param id
+     * @return new InstanceId(id)
+     */
+    @VisibleForTesting
+    protected InstanceId newInstanceIdInternal(int id) {
+        return new InstanceId(id);
+    }
+}
diff --git a/src/com/android/launcher3/logging/StatsLogManager.java b/src/com/android/launcher3/logging/StatsLogManager.java
index 05dd473..62a3829 100644
--- a/src/com/android/launcher3/logging/StatsLogManager.java
+++ b/src/com/android/launcher3/logging/StatsLogManager.java
@@ -45,7 +45,9 @@
         @LauncherUiEvent(doc = "TASK dismissed from overview using SWIPE UP")
         TASK_DISMISS_SWIPE_UP(3),
         @LauncherUiEvent(doc = "User dragged a launcher item")
-        LAUNCHER_ITEM_DRAG_STARTED(383);
+        LAUNCHER_ITEM_DRAG_STARTED(383),
+        @LauncherUiEvent(doc = "A dragged launcher item is successfully dropped")
+        LAUNCHER_ITEM_DROP_COMPLETED(385);
         // ADD MORE
 
         private final int mId;
@@ -83,6 +85,14 @@
     }
 
     /**
+     * Logs an event and accompanying {@link ItemInfo}
+     */
+    public void log(LauncherEvent event, InstanceId instanceId, LauncherAtom.ItemInfo itemInfo) {
+        Log.d(TAG, String.format("%s(InstanceId:%s)\n%s", event.name(), instanceId, itemInfo));
+        // Call StatsLog method
+    }
+
+    /**
      * Logs snapshot, or impression of the current workspace.
      */
     public void logSnapshot() { }
diff --git a/src/com/android/launcher3/util/DefaultDisplay.java b/src/com/android/launcher3/util/DefaultDisplay.java
index d51f777..fabdb4e 100644
--- a/src/com/android/launcher3/util/DefaultDisplay.java
+++ b/src/com/android/launcher3/util/DefaultDisplay.java
@@ -47,6 +47,8 @@
     public static final int CHANGE_ROTATION = 1 << 1;
     public static final int CHANGE_FRAME_DELAY = 1 << 2;
 
+    public static final int CHANGE_ALL = CHANGE_SIZE | CHANGE_ROTATION | CHANGE_FRAME_DELAY;
+
     private final Context mContext;
     private final int mId;
     private final ArrayList<DisplayInfoChangeListener> mListeners = new ArrayList<>();