🍝🏠 Refactor MostVisited UI management, extract it for reuse in Home.

chrome/android/java/src/org/chromium/chrome/browser/favicon/LargeIconBridge.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.favicon;
 
 import android.graphics.Bitmap;
+import android.support.annotation.Nullable;
 import android.util.LruCache;
 
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.chrome.browser.profiles.Profile;
 
 /**
  * A Java API for using the C++ LargeIconService.
  *
  * An instance of this class must be created, used, and destroyed on the same thread.
  */
@@ skipping 20 matching lines @@
      * Callback for use with GetLargeIconForUrl().
      */
     public interface LargeIconCallback {
         /**
          * Called when the icon or fallback color is available.
          *
          * @param icon The icon, or null if none is available.
          * @param fallbackColor The fallback color to use if icon is null.
          */
         @CalledByNative("LargeIconCallback")
-        void onLargeIconAvailable(Bitmap icon, int fallbackColor, boolean isFallbackColorDefault);
+        void onLargeIconAvailable(
+                @Nullable Bitmap icon, int fallbackColor, boolean isFallbackColorDefault);
     }
 
     /**
      * Initializes the C++ side of this class.
      * @param profile Profile to use when fetching icons.
      */
     public LargeIconBridge(Profile profile) {
         mNativeLargeIconBridge = nativeInit();
         mProfile = profile;
     }
@@ skipping 66 matching lines @@
             return nativeGetLargeIconForURL(mNativeLargeIconBridge, mProfile, pageUrl,
                     desiredSizePx, callbackWrapper);
         }
     }
 
     private static native long nativeInit();
     private static native void nativeDestroy(long nativeLargeIconBridge);
     private static native boolean nativeGetLargeIconForURL(long nativeLargeIconBridge,
             Profile profile, String pageUrl, int desiredSizePx, LargeIconCallback callback);
 }