diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 49efc5d..f391a19 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -50,11 +50,13 @@
         android:protectionLevel="signatureOrSystem"
         android:label="@string/permlab_write_settings"
         android:description="@string/permdesc_write_settings"/>
-
     <permission
         android:name="com.android.launcher3.permission.RECEIVE_LAUNCH_BROADCASTS"
         android:protectionLevel="signature"
         />
+    <permission
+        android:name="com.android.launcher3.permission.RECEIVE_FIRST_LOAD_BROADCAST"
+        android:protectionLevel="signatureOrSystem" />
 
     <uses-permission android:name="android.permission.CALL_PHONE" />
     <uses-permission android:name="android.permission.SET_WALLPAPER" />
diff --git a/WallpaperPicker/src/com/android/launcher3/Partner.java b/WallpaperPicker/src/com/android/launcher3/Partner.java
index d3c825d..d172ce9 100644
--- a/WallpaperPicker/src/com/android/launcher3/Partner.java
+++ b/WallpaperPicker/src/com/android/launcher3/Partner.java
@@ -24,6 +24,8 @@
 import android.content.res.Resources;
 import android.util.Log;
 
+import java.io.File;
+
 /**
  * Utilities to discover and interact with partner customizations. There can
  * only be one set of customizations on a device, and it must be bundled with
@@ -40,6 +42,9 @@
     public static final String RESOURCE_WALLPAPERS = "partner_wallpapers";
     public static final String RESOURCE_DEFAULT_LAYOUT = "partner_default_layout";
 
+    public static final String RESOURCE_DEFAULT_WALLPAPER_HIDDEN = "default_wallpapper_hidden";
+    public static final String RESOURCE_SYSTEM_WALLPAPER_DIR = "system_wallpaper_directory";
+
     private static boolean sSearched = false;
     private static Partner sPartner;
 
@@ -94,4 +99,16 @@
                 "xml", getPackageName());
         return folder != 0;
     }
+
+    public boolean hideDefaultWallpaper() {
+        int resId = getResources().getIdentifier(RESOURCE_DEFAULT_WALLPAPER_HIDDEN, "bool",
+                getPackageName());
+        return resId != 0 && getResources().getBoolean(resId);
+    }
+
+    public File getWallpaperDirectory() {
+        int resId = getResources().getIdentifier(RESOURCE_SYSTEM_WALLPAPER_DIR, "string",
+                getPackageName());
+        return (resId != 0) ? new File(getResources().getString(resId)) : null;
+    }
 }
diff --git a/WallpaperPicker/src/com/android/launcher3/SavedWallpaperImages.java b/WallpaperPicker/src/com/android/launcher3/SavedWallpaperImages.java
index 44bfdf1..2bdf8f1 100644
--- a/WallpaperPicker/src/com/android/launcher3/SavedWallpaperImages.java
+++ b/WallpaperPicker/src/com/android/launcher3/SavedWallpaperImages.java
@@ -34,8 +34,6 @@
 import android.widget.BaseAdapter;
 import android.widget.ListAdapter;
 
-import com.android.photos.BitmapRegionTileSource;
-
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -49,39 +47,17 @@
     Context mContext;
     LayoutInflater mLayoutInflater;
 
-    public static class SavedWallpaperTile extends WallpaperPickerActivity.WallpaperTileInfo {
+    public static class SavedWallpaperTile extends WallpaperPickerActivity.FileWallpaperInfo {
         private int mDbId;
-        private Drawable mThumb;
-        public SavedWallpaperTile(int dbId, Drawable thumb) {
+        public SavedWallpaperTile(int dbId, File target, Drawable thumb) {
+            super(target, thumb);
             mDbId = dbId;
-            mThumb = thumb;
         }
-        @Override
-        public void onClick(WallpaperPickerActivity a) {
-            String imageFilename = a.getSavedImages().getImageFilename(mDbId);
-            File file = new File(a.getFilesDir(), imageFilename);
-            BitmapRegionTileSource.FilePathBitmapSource bitmapSource =
-                    new BitmapRegionTileSource.FilePathBitmapSource(file.getAbsolutePath(), 1024);
-            a.setCropViewTileSource(bitmapSource, false, true, null);
-        }
-        @Override
-        public void onSave(WallpaperPickerActivity a) {
-            boolean finishActivityWhenDone = true;
-            String imageFilename = a.getSavedImages().getImageFilename(mDbId);
-            a.setWallpaper(imageFilename, finishActivityWhenDone);
-        }
+
         @Override
         public void onDelete(WallpaperPickerActivity a) {
             a.getSavedImages().deleteImage(mDbId);
         }
-        @Override
-        public boolean isSelectable() {
-            return true;
-        }
-        @Override
-        public boolean isNamelessWallpaper() {
-            return true;
-        }
     }
 
     public SavedWallpaperImages(Activity context) {
@@ -98,7 +74,8 @@
         SQLiteDatabase db = mDb.getReadableDatabase();
         Cursor result = db.query(ImageDb.TABLE_NAME,
                 new String[] { ImageDb.COLUMN_ID,
-                    ImageDb.COLUMN_IMAGE_THUMBNAIL_FILENAME }, // cols to return
+                    ImageDb.COLUMN_IMAGE_THUMBNAIL_FILENAME,
+                    ImageDb.COLUMN_IMAGE_FILENAME}, // cols to return
                 null, // select query
                 null, // args to select query
                 null,
@@ -112,7 +89,9 @@
 
             Bitmap thumb = BitmapFactory.decodeFile(file.getAbsolutePath());
             if (thumb != null) {
-                mImages.add(new SavedWallpaperTile(result.getInt(0), new BitmapDrawable(thumb)));
+                mImages.add(new SavedWallpaperTile(result.getInt(0),
+                        new File(mContext.getFilesDir(), result.getString(2)),
+                        new BitmapDrawable(thumb)));
             }
         }
         result.close();
@@ -136,15 +115,7 @@
             Log.e(TAG, "Error decoding thumbnail for wallpaper #" + position);
         }
         return WallpaperPickerActivity.createImageTileView(
-                mLayoutInflater, position, convertView, parent, thumbDrawable);
-    }
-
-    public String getImageFilename(int id) {
-        Pair<String, String> filenames = getImageFilenames(id);
-        if (filenames != null) {
-            return filenames.second;
-        }
-        return null;
+                mLayoutInflater, convertView, parent, thumbDrawable);
     }
 
     private Pair<String, String> getImageFilenames(int id) {
diff --git a/WallpaperPicker/src/com/android/launcher3/WallpaperCropActivity.java b/WallpaperPicker/src/com/android/launcher3/WallpaperCropActivity.java
index 8652d85..d5c7cd9 100644
--- a/WallpaperPicker/src/com/android/launcher3/WallpaperCropActivity.java
+++ b/WallpaperPicker/src/com/android/launcher3/WallpaperCropActivity.java
@@ -308,10 +308,10 @@
         return 0;
     }
 
-    protected void setWallpaper(String filePath, final boolean finishActivityWhenDone) {
-        int rotation = getRotationFromExif(filePath);
+    protected void setWallpaper(Uri uri, final boolean finishActivityWhenDone) {
+        int rotation = getRotationFromExif(this, uri);
         BitmapCropTask cropTask = new BitmapCropTask(
-                this, filePath, null, rotation, 0, 0, true, false, null);
+                this, uri, null, rotation, 0, 0, true, false, null);
         final Point bounds = cropTask.getImageBounds();
         Runnable onEndCrop = new Runnable() {
             public void run() {
diff --git a/WallpaperPicker/src/com/android/launcher3/WallpaperPickerActivity.java b/WallpaperPicker/src/com/android/launcher3/WallpaperPickerActivity.java
index b5e34cf..95b19ce 100644
--- a/WallpaperPicker/src/com/android/launcher3/WallpaperPickerActivity.java
+++ b/WallpaperPicker/src/com/android/launcher3/WallpaperPickerActivity.java
@@ -17,6 +17,7 @@
 package com.android.launcher3;
 
 import android.animation.LayoutTransition;
+import android.annotation.TargetApi;
 import android.app.ActionBar;
 import android.app.Activity;
 import android.app.WallpaperInfo;
@@ -61,12 +62,12 @@
 import android.view.WindowManager;
 import android.view.animation.AccelerateInterpolator;
 import android.view.animation.DecelerateInterpolator;
+import android.widget.ArrayAdapter;
 import android.widget.BaseAdapter;
 import android.widget.FrameLayout;
 import android.widget.HorizontalScrollView;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
-import android.widget.ListAdapter;
 import android.widget.Toast;
 
 import com.android.photos.BitmapRegionTileSource;
@@ -109,6 +110,8 @@
 
     public static abstract class WallpaperTileInfo {
         protected View mView;
+        public Drawable mThumb;
+
         public void setView(View v) {
             mView = v;
         }
@@ -194,10 +197,36 @@
         }
     }
 
+    public static class FileWallpaperInfo extends WallpaperTileInfo {
+        private File mFile;
+
+        public FileWallpaperInfo(File target, Drawable thumb) {
+            mFile = target;
+            mThumb = thumb;
+        }
+        @Override
+        public void onClick(WallpaperPickerActivity a) {
+            BitmapRegionTileSource.UriBitmapSource bitmapSource =
+                    new BitmapRegionTileSource.UriBitmapSource(a, Uri.fromFile(mFile), 1024);
+            a.setCropViewTileSource(bitmapSource, false, true, null);
+        }
+        @Override
+        public void onSave(WallpaperPickerActivity a) {
+            a.setWallpaper(Uri.fromFile(mFile), true);
+        }
+        @Override
+        public boolean isSelectable() {
+            return true;
+        }
+        @Override
+        public boolean isNamelessWallpaper() {
+            return true;
+        }
+    }
+
     public static class ResourceWallpaperInfo extends WallpaperTileInfo {
         private Resources mResources;
         private int mResId;
-        private Drawable mThumb;
 
         public ResourceWallpaperInfo(Resources res, int resId, Drawable thumb) {
             mResources = res;
@@ -237,8 +266,8 @@
         }
     }
 
+    @TargetApi(Build.VERSION_CODES.KITKAT)
     public static class DefaultWallpaperInfo extends WallpaperTileInfo {
-        public Drawable mThumb;
         public DefaultWallpaperInfo(Drawable thumb) {
             mThumb = thumb;
         }
@@ -431,9 +460,9 @@
         };
 
         // Populate the built-in wallpapers
-        ArrayList<ResourceWallpaperInfo> wallpapers = findBundledWallpapers();
+        ArrayList<WallpaperTileInfo> wallpapers = findBundledWallpapers();
         mWallpapersView = (LinearLayout) findViewById(R.id.wallpaper_list);
-        BuiltInWallpapersAdapter ia = new BuiltInWallpapersAdapter(this, wallpapers);
+        SimpleWallpapersAdapter ia = new SimpleWallpapersAdapter(this, wallpapers);
         populateWallpapersFromAdapter(mWallpapersView, ia, false);
 
         // Populate the saved wallpapers
@@ -484,20 +513,6 @@
         pickImageInfo.setView(pickImageTile);
         pickImageTile.setOnClickListener(mThumbnailOnClickListener);
 
-        // Add a tile for the default wallpaper
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
-            DefaultWallpaperInfo defaultWallpaperInfo = getDefaultWallpaper();
-            if (defaultWallpaperInfo != null) {
-                FrameLayout defaultWallpaperTile = (FrameLayout) createImageTileView(
-                        getLayoutInflater(), 0, null, mWallpapersView, defaultWallpaperInfo.mThumb);
-                setWallpaperItemPaddingToZero(defaultWallpaperTile);
-                defaultWallpaperTile.setTag(defaultWallpaperInfo);
-                mWallpapersView.addView(defaultWallpaperTile, 0);
-                defaultWallpaperTile.setOnClickListener(mThumbnailOnClickListener);
-                defaultWallpaperInfo.setView(defaultWallpaperTile);
-            }
-        }
-
         // Select the first item; wait for a layout pass so that we initialize the dimensions of
         // cropView or the defaultWallpaperView first
         mCropView.addOnLayoutChangeListener(new OnLayoutChangeListener() {
@@ -825,12 +840,26 @@
         final Context context = this;
         new AsyncTask<Void, Bitmap, Bitmap>() {
             protected Bitmap doInBackground(Void...args) {
-                int rotation = WallpaperCropActivity.getRotationFromExif(context, uri);
-                return createThumbnail(defaultSize, context, uri, null, null, 0, rotation, false);
-
+                try {
+                    int rotation = WallpaperCropActivity.getRotationFromExif(context, uri);
+                    return createThumbnail(defaultSize, context, uri, null, null, 0, rotation, false);
+                } catch (SecurityException securityException) {
+                    if (isDestroyed()) {
+                        // Temporarily granted permissions are revoked when the activity
+                        // finishes, potentially resulting in a SecurityException here.
+                        // Even though {@link #isDestroyed} might also return true in different
+                        // situations where the configuration changes, we are fine with
+                        // catching these cases here as well.
+                        cancel(false);
+                    } else {
+                        // otherwise it had a different cause and we throw it further
+                        throw securityException;
+                    }
+                    return null;
+                }
             }
             protected void onPostExecute(Bitmap thumb) {
-                if (thumb != null) {
+                if (!isCancelled() && thumb != null) {
                     image.setImageBitmap(thumb);
                     Drawable thumbDrawable = image.getDrawable();
                     thumbDrawable.setDither(true);
@@ -889,9 +918,9 @@
         v.setOnLongClickListener(mLongClickListener);
     }
 
-    private ArrayList<ResourceWallpaperInfo> findBundledWallpapers() {
+    private ArrayList<WallpaperTileInfo> findBundledWallpapers() {
         final PackageManager pm = getPackageManager();
-        final ArrayList<ResourceWallpaperInfo> bundled = new ArrayList<ResourceWallpaperInfo>(24);
+        final ArrayList<WallpaperTileInfo> bundled = new ArrayList<WallpaperTileInfo>(24);
 
         Partner partner = Partner.get(pm);
         if (partner != null) {
@@ -901,6 +930,34 @@
             if (resId != 0) {
                 addWallpapers(bundled, partnerRes, partner.getPackageName(), resId);
             }
+
+            // Add system wallpapers
+            File systemDir = partner.getWallpaperDirectory();
+            if (systemDir != null && systemDir.isDirectory()) {
+                for (File file : systemDir.listFiles()) {
+                    if (!file.isFile()) {
+                        continue;
+                    }
+                    String name = file.getName();
+                    int dotPos = name.lastIndexOf('.');
+                    String extension = "";
+                    if (dotPos >= -1) {
+                        extension = name.substring(dotPos);
+                        name = name.substring(0, dotPos);
+                    }
+
+                    if (name.endsWith("_small")) {
+                        // it is a thumbnail
+                        continue;
+                    }
+
+                    File thumbnail = new File(systemDir, name + "_small" + extension);
+                    Bitmap thumb = BitmapFactory.decodeFile(thumbnail.getAbsolutePath());
+                    if (thumb != null) {
+                        bundled.add(new FileWallpaperInfo(file, new BitmapDrawable(thumb)));
+                    }
+                }
+            }
         }
 
         Pair<ApplicationInfo, Integer> r = getWallpaperArrayResourceId();
@@ -912,9 +969,12 @@
             }
         }
 
-        // Add an entry for the default wallpaper (stored in system resources)
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
-            ResourceWallpaperInfo defaultWallpaperInfo = getPreKKDefaultWallpaperInfo();
+        if (partner == null || !partner.hideDefaultWallpaper()) {
+            // Add an entry for the default wallpaper (stored in system resources)
+            WallpaperTileInfo defaultWallpaperInfo =
+                    (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT)
+                    ? getPreKKDefaultWallpaperInfo()
+                    : getDefaultWallpaper();
             if (defaultWallpaperInfo != null) {
                 bundled.add(0, defaultWallpaperInfo);
             }
@@ -963,6 +1023,7 @@
         return null;
     }
 
+    @TargetApi(Build.VERSION_CODES.KITKAT)
     private DefaultWallpaperInfo getDefaultWallpaper() {
         File defaultThumbFile = new File(getFilesDir(), DEFAULT_WALLPAPER_THUMBNAIL_FILENAME);
         Bitmap thumb = null;
@@ -1011,7 +1072,7 @@
         }
     }
 
-    private void addWallpapers(ArrayList<ResourceWallpaperInfo> known, Resources res,
+    private void addWallpapers(ArrayList<WallpaperTileInfo> known, Resources res,
             String packageName, int listResId) {
         final String[] extras = res.getStringArray(listResId);
         for (String extra : extras) {
@@ -1058,37 +1119,24 @@
         }
     }
 
-    private static class BuiltInWallpapersAdapter extends BaseAdapter implements ListAdapter {
-        private LayoutInflater mLayoutInflater;
-        private ArrayList<ResourceWallpaperInfo> mWallpapers;
+    private static class SimpleWallpapersAdapter extends ArrayAdapter<WallpaperTileInfo> {
+        private final LayoutInflater mLayoutInflater;
 
-        BuiltInWallpapersAdapter(Activity activity, ArrayList<ResourceWallpaperInfo> wallpapers) {
+        SimpleWallpapersAdapter(Activity activity, ArrayList<WallpaperTileInfo> wallpapers) {
+            super(activity, R.layout.wallpaper_picker_item, wallpapers);
             mLayoutInflater = activity.getLayoutInflater();
-            mWallpapers = wallpapers;
-        }
-
-        public int getCount() {
-            return mWallpapers.size();
-        }
-
-        public ResourceWallpaperInfo getItem(int position) {
-            return mWallpapers.get(position);
-        }
-
-        public long getItemId(int position) {
-            return position;
         }
 
         public View getView(int position, View convertView, ViewGroup parent) {
-            Drawable thumb = mWallpapers.get(position).mThumb;
+            Drawable thumb = getItem(position).mThumb;
             if (thumb == null) {
                 Log.e(TAG, "Error decoding thumbnail for wallpaper #" + position);
             }
-            return createImageTileView(mLayoutInflater, position, convertView, parent, thumb);
+            return createImageTileView(mLayoutInflater, convertView, parent, thumb);
         }
     }
 
-    public static View createImageTileView(LayoutInflater layoutInflater, int position,
+    public static View createImageTileView(LayoutInflater layoutInflater,
             View convertView, ViewGroup parent, Drawable thumb) {
         View view;
 
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 1ee1be6..780dcd2 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -27,6 +27,9 @@
     <!-- Permission to receive the com.android.launcher3.action.LAUNCH intent -->
     <string name="receive_launch_broadcasts_permission" translatable="false">com.android.launcher3.permission.RECEIVE_LAUNCH_BROADCASTS</string>
 
+    <!-- Permission to receive the com.android.launcher3.action.FIRST_LOAD_COMPLETE intent -->
+    <string name="receive_first_load_broadcast_permission" translatable="false">com.android.launcher3.permission.RECEIVE_FIRST_LOAD_BROADCAST</string>
+
     <!-- Application name -->
     <string name="application_name">Launcher3</string>
     <!-- Accessibility-facing application name -->
diff --git a/src/com/android/launcher3/AppsCustomizeTabHost.java b/src/com/android/launcher3/AppsCustomizeTabHost.java
index 334d8b6..283f4ed 100644
--- a/src/com/android/launcher3/AppsCustomizeTabHost.java
+++ b/src/com/android/launcher3/AppsCustomizeTabHost.java
@@ -150,7 +150,7 @@
     }
 
     @Override
-    public View getContent() {
+    public ViewGroup getContent() {
         return mPagedView;
     }
 
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index 8ca8d91..1073764 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -30,8 +30,6 @@
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Point;
-import android.graphics.PorterDuff;
-import android.graphics.PorterDuffXfermode;
 import android.graphics.Rect;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
@@ -169,8 +167,6 @@
 
     private Rect mTempRect = new Rect();
 
-    private final static PorterDuffXfermode sAddBlendMode =
-            new PorterDuffXfermode(PorterDuff.Mode.ADD);
     private final static Paint sPaint = new Paint();
 
     public CellLayout(Context context) {
@@ -579,7 +575,15 @@
     }
 
     public void restoreInstanceState(SparseArray<Parcelable> states) {
-        dispatchRestoreInstanceState(states);
+        try {
+            dispatchRestoreInstanceState(states);
+        } catch (IllegalArgumentException ex) {
+            if (LauncherAppState.isDogfoodBuild()) {
+                throw ex;
+            }
+            // Mismatched viewId / viewType preventing restore. Skip restore on production builds.
+            Log.e(TAG, "Ignoring an error while restoring a view instance state", ex);
+        }
     }
 
     @Override
@@ -700,9 +704,6 @@
         // First we clear the tag to ensure that on every touch down we start with a fresh slate,
         // even in the case where we return early. Not clearing here was causing bugs whereby on
         // long-press we'd end up picking up an item from a previous drag operation.
-        final int action = ev.getAction();
-
-
         if (mInterceptTouchListener != null && mInterceptTouchListener.onTouch(this, ev)) {
             return true;
         }
diff --git a/src/com/android/launcher3/FocusHelper.java b/src/com/android/launcher3/FocusHelper.java
index bb62bac..b1250ce 100644
--- a/src/com/android/launcher3/FocusHelper.java
+++ b/src/com/android/launcher3/FocusHelper.java
@@ -71,20 +71,20 @@
     /**
      * Private helper to get the parent TabHost in the view hiearchy.
      */
-    private static TabHost findTabHostParent(View v) {
+    private static AppsCustomizeTabHost findTabHostParent(View v) {
         ViewParent p = v.getParent();
-        while (p != null && !(p instanceof TabHost)) {
+        while (p != null && !(p instanceof AppsCustomizeTabHost)) {
             p = p.getParent();
         }
-        return (TabHost) p;
+        return (AppsCustomizeTabHost) p;
     }
 
     /**
      * Handles key events in a AppsCustomize tab between the last tab view and the shop button.
      */
     static boolean handleAppsCustomizeTabKeyEvent(View v, int keyCode, KeyEvent e) {
-        final TabHost tabHost = findTabHostParent(v);
-        final ViewGroup contents = tabHost.getTabContentView();
+        final AppsCustomizeTabHost tabHost = findTabHostParent(v);
+        final ViewGroup contents = tabHost.getContent();
         final View shop = tabHost.findViewById(R.id.market_button);
 
         final int action = e.getAction();
@@ -134,8 +134,7 @@
 
         final PagedViewGridLayout parent = (PagedViewGridLayout) w.getParent();
         final PagedView container = (PagedView) parent.getParent();
-        final TabHost tabHost = findTabHostParent(container);
-        final TabWidget tabs = tabHost.getTabWidget();
+        final AppsCustomizeTabHost tabHost = findTabHostParent(container);
         final int widgetIndex = parent.indexOfChild(w);
         final int widgetCount = parent.getChildCount();
         final int pageIndex = ((PagedView) container).indexToPage(container.indexOfChild(parent));
@@ -194,8 +193,6 @@
                         int newWidgetIndex = ((y - 1) * cellCountX) + x;
                         child = parent.getChildAt(newWidgetIndex);
                         if (child != null) child.requestFocus();
-                    } else {
-                        tabs.requestFocus();
                     }
                 }
                 wasHandled = true;
@@ -294,8 +291,7 @@
         // Note we have an extra parent because of the
         // PagedViewCellLayout/PagedViewCellLayoutChildren relationship
         final PagedView container = (PagedView) parentLayout.getParent();
-        final TabHost tabHost = findTabHostParent(container);
-        final TabWidget tabs = tabHost.getTabWidget();
+        final AppsCustomizeTabHost tabHost = findTabHostParent(container);
         final int iconIndex = itemContainer.indexOfChild(v);
         final int itemCount = itemContainer.getChildCount();
         final int pageIndex = ((PagedView) container).indexToPage(container.indexOfChild(parentLayout));
@@ -354,8 +350,6 @@
                     if (y > 0) {
                         int newiconIndex = ((y - 1) * countX) + x;
                         itemContainer.getChildAt(newiconIndex).requestFocus();
-                    } else {
-                        tabs.requestFocus();
                     }
                 }
                 wasHandled = true;
@@ -439,8 +433,8 @@
         if (!LauncherAppState.getInstance().isScreenLarge()) return false;
 
         final FocusOnlyTabWidget parent = (FocusOnlyTabWidget) v.getParent();
-        final TabHost tabHost = findTabHostParent(parent);
-        final ViewGroup contents = tabHost.getTabContentView();
+        final AppsCustomizeTabHost tabHost = findTabHostParent(parent);
+        final ViewGroup contents = tabHost.getContent();
         final int tabCount = parent.getTabCount();
         final int tabIndex = parent.getChildTabIndex(v);
 
diff --git a/src/com/android/launcher3/IconCache.java b/src/com/android/launcher3/IconCache.java
index 7d8628d..221df58 100644
--- a/src/com/android/launcher3/IconCache.java
+++ b/src/com/android/launcher3/IconCache.java
@@ -64,8 +64,8 @@
 
     private static class CacheEntry {
         public Bitmap icon;
-        public String title;
-        public String contentDescription;
+        public CharSequence title;
+        public CharSequence contentDescription;
     }
 
     private static class CacheKey {
diff --git a/src/com/android/launcher3/ItemInfo.java b/src/com/android/launcher3/ItemInfo.java
index fe03017..c726fb4 100644
--- a/src/com/android/launcher3/ItemInfo.java
+++ b/src/com/android/launcher3/ItemInfo.java
@@ -110,7 +110,7 @@
     /**
      * Content description of the item.
      */
-    String contentDescription;
+    CharSequence contentDescription;
 
     /**
      * The position of the item in a drag-and-drop operation.
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 65f9cbe..3cbe1c1 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -209,6 +209,10 @@
     static final String INTRO_SCREEN_DISMISSED = "launcher.intro_screen_dismissed";
     static final String FIRST_RUN_ACTIVITY_DISPLAYED = "launcher.first_run_activity_displayed";
 
+    static final String FIRST_LOAD_COMPLETE = "launcher.first_load_complete";
+    static final String ACTION_FIRST_LOAD_COMPLETE =
+            "com.android.launcher3.action.FIRST_LOAD_COMPLETE";
+
     private static final String TOOLBAR_ICON_METADATA_NAME = "com.android.launcher.toolbar_icon";
     private static final String TOOLBAR_SEARCH_ICON_METADATA_NAME =
             "com.android.launcher.toolbar_search_icon";
@@ -4454,6 +4458,7 @@
         }
 
         setWorkspaceLoading(false);
+        sendLoadingCompleteBroadcastIfNecessary();
 
         // If we received the result of any pending adds while the loader was running (e.g. the
         // widget configuration forced an orientation change), process them now.
@@ -4478,6 +4483,18 @@
         }
     }
 
+    private void sendLoadingCompleteBroadcastIfNecessary() {
+        if (!mSharedPrefs.getBoolean(FIRST_LOAD_COMPLETE, false)) {
+            String permission =
+                    getResources().getString(R.string.receive_first_load_broadcast_permission);
+            Intent intent = new Intent(ACTION_FIRST_LOAD_COMPLETE);
+            sendBroadcast(intent, permission);
+            SharedPreferences.Editor editor = mSharedPrefs.edit();
+            editor.putBoolean(FIRST_LOAD_COMPLETE, true);
+            editor.apply();
+        }
+    }
+
     public boolean isAllAppsButtonRank(int rank) {
         if (mHotseat != null) {
             return mHotseat.isAllAppsButtonRank(rank);
@@ -4912,7 +4929,7 @@
     public ItemInfo createShortcutDragInfo(Intent shortcutIntent, CharSequence caption,
             Bitmap icon, UserHandleCompat user) {
         UserManagerCompat userManager = UserManagerCompat.getInstance(this);
-        String contentDescription = userManager.getBadgedLabelForUser(caption.toString(), user);
+        CharSequence contentDescription = userManager.getBadgedLabelForUser(caption, user);
         return new ShortcutInfo(shortcutIntent, caption, contentDescription, icon, user);
     }
 
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index 2256179..ac4a206 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -99,6 +99,8 @@
     private static final String ACTION_APPWIDGET_DEFAULT_WORKSPACE_CONFIGURE =
             "com.android.launcher.action.APPWIDGET_DEFAULT_WORKSPACE_CONFIGURE";
 
+    private static final String URI_PARAM_IS_EXTERNAL_ADD = "isExternalAdd";
+
     private LauncherProviderChangeListener mListener;
 
     /**
@@ -175,6 +177,14 @@
     public Uri insert(Uri uri, ContentValues initialValues) {
         SqlArguments args = new SqlArguments(uri);
 
+        // In very limited cases, we support system|signature permission apps to add to the db
+        String externalAdd = uri.getQueryParameter(URI_PARAM_IS_EXTERNAL_ADD);
+        if (externalAdd != null && "true".equals(externalAdd)) {
+            if (!mOpenHelper.initializeExternalAdd(initialValues)) {
+                return null;
+            }
+        }
+
         SQLiteDatabase db = mOpenHelper.getWritableDatabase();
         addModifiedTime(initialValues);
         final long rowId = dbInsertAndCheck(mOpenHelper, db, args.table, null, initialValues);
@@ -186,6 +196,7 @@
         return uri;
     }
 
+
     @Override
     public int bulkInsert(Uri uri, ContentValues[] values) {
         SqlArguments args = new SqlArguments(uri);
@@ -1245,6 +1256,38 @@
             if (LOGD) Log.d(TAG, "mMaxItemId: " + mMaxItemId);
         }
 
+        private boolean initializeExternalAdd(ContentValues values) {
+            // 1. Ensure that externally added items have a valid item id
+            long id = generateNewItemId();
+            values.put(LauncherSettings.Favorites._ID, id);
+
+            // 2. In the case of an app widget, and if no app widget id is specified, we
+            // attempt allocate and bind the widget.
+            Integer itemType = values.getAsInteger(LauncherSettings.Favorites.ITEM_TYPE);
+            if (itemType != null &&
+                    itemType.intValue() == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET &&
+                    !values.containsKey(LauncherSettings.Favorites.APPWIDGET_ID)) {
+
+                final AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(mContext);
+                ComponentName cn = ComponentName.unflattenFromString(
+                        values.getAsString(Favorites.APPWIDGET_PROVIDER));
+
+                if (cn != null) {
+                    try {
+                        int appWidgetId = mAppWidgetHost.allocateAppWidgetId();
+                        values.put(LauncherSettings.Favorites.APPWIDGET_ID, appWidgetId);
+                        if (appWidgetManager.bindAppWidgetIdIfAllowed(appWidgetId,cn)) {
+                            return true;
+                        }
+                    } catch (RuntimeException e) {
+                        Log.e(TAG, "Failed to initialize external widget", e);
+                    }
+                }
+                return false;
+            }
+            return true;
+        }
+
         private static final void beginDocument(XmlPullParser parser, String firstElementName)
                 throws XmlPullParserException, IOException {
             int type;
@@ -1752,6 +1795,7 @@
 
             return false;
         }
+
         private boolean addAppWidget(SQLiteDatabase db, ContentValues values, ComponentName cn,
                Bundle extras) {
             boolean allocatedAppWidgets = false;
diff --git a/src/com/android/launcher3/ShortcutInfo.java b/src/com/android/launcher3/ShortcutInfo.java
index 087c3c5..dc019b2 100644
--- a/src/com/android/launcher3/ShortcutInfo.java
+++ b/src/com/android/launcher3/ShortcutInfo.java
@@ -126,7 +126,7 @@
         }
     }
 
-    ShortcutInfo(Intent intent, CharSequence title, String contentDescription,
+    ShortcutInfo(Intent intent, CharSequence title, CharSequence contentDescription,
             Bitmap icon, UserHandleCompat user) {
         this();
         this.intent = intent;
diff --git a/src/com/android/launcher3/compat/UserManagerCompat.java b/src/com/android/launcher3/compat/UserManagerCompat.java
index c10a743..8effb81 100644
--- a/src/com/android/launcher3/compat/UserManagerCompat.java
+++ b/src/com/android/launcher3/compat/UserManagerCompat.java
@@ -41,5 +41,5 @@
     public abstract long getSerialNumberForUser(UserHandleCompat user);
     public abstract UserHandleCompat getUserForSerialNumber(long serialNumber);
     public abstract Drawable getBadgedDrawableForUser(Drawable unbadged, UserHandleCompat user);
-    public abstract String getBadgedLabelForUser(String label, UserHandleCompat user);
+    public abstract CharSequence getBadgedLabelForUser(CharSequence label, UserHandleCompat user);
 }
diff --git a/src/com/android/launcher3/compat/UserManagerCompatV16.java b/src/com/android/launcher3/compat/UserManagerCompatV16.java
index 03dd097..32f972e 100644
--- a/src/com/android/launcher3/compat/UserManagerCompatV16.java
+++ b/src/com/android/launcher3/compat/UserManagerCompatV16.java
@@ -45,7 +45,7 @@
         return 0;
     }
 
-    public String getBadgedLabelForUser(String label, UserHandleCompat user) {
+    public CharSequence getBadgedLabelForUser(CharSequence label, UserHandleCompat user) {
         return label;
     }
 }
diff --git a/src/com/android/launcher3/compat/UserManagerCompatVL.java b/src/com/android/launcher3/compat/UserManagerCompatVL.java
index e071a8f..da7b116 100644
--- a/src/com/android/launcher3/compat/UserManagerCompatVL.java
+++ b/src/com/android/launcher3/compat/UserManagerCompatVL.java
@@ -49,11 +49,12 @@
         return mUserManager.getBadgedDrawableForUser(unbadged, user.getUser());
     }
 
-    public String getBadgedLabelForUser(String label, UserHandleCompat user) {
+    public CharSequence getBadgedLabelForUser(CharSequence label, UserHandleCompat user) {
         if (user == null) {
             return label;
         }
-        return mUserManager.getBadgedLabelForUser(label, user.getUser());
+        // TODO Remove casts when API has made it from lmp-dev -> sdk
+        return (CharSequence) mUserManager.getBadgedLabelForUser((String) label, user.getUser());
     }
 }