[Android] Add enhanced bookmarks grid/list view experiment.

chrome/android/java/src/org/chromium/chrome/browser/enhanced_bookmarks/EnhancedBookmarksBridge.java

 // Copyright 2014 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.enhanced_bookmarks;
 
 import android.app.ActivityManager;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.util.LruCache;
@@ skipping 250 matching lines @@
     /**
      * @return Current set of known auto-filters for bookmarks.
      */
     public List<String> getFilters() {
         List<String> list =
                 Arrays.asList(nativeGetFilters(mNativeEnhancedBookmarksBridge));
         return list;
     }
 
     /**
+     * @see |enhanced_bookmarks::GetDefaultViewMode()|
+     */
+    public static int getDefaultViewMode() {
+        return nativeGetDefaultViewMode();
+    }
+
+    /**
      * @return Return the cache if it is stored in the static weak reference, or create a new empty
      *         one if the reference is empty.
      */
     private static LruCache<String, Pair<String, Bitmap>> getImageCache() {
         ActivityManager activityManager = ((ActivityManager) ApplicationStatus
                 .getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE));
         int maxSize = Math.min(activityManager.getMemoryClass() / 4 * 1024 * 1024,
                 SALIENT_IMAGE_MAX_CACHE_SIZE);
         LruCache<String, Pair<String, Bitmap>> cache = sLruCache == null ? null : sLruCache.get();
         if (cache == null) {
@@ skipping 49 matching lines @@
             int index, String title);
     private native void nativeMoveBookmark(long nativeEnhancedBookmarksBridge,
             BookmarkId bookmarkId, BookmarkId newParentId);
     private native BookmarkId nativeAddBookmark(long nativeEnhancedBookmarksBridge,
             BookmarkId parent, int index, String title, String url);
     private native void nativeSendSearchRequest(long nativeEnhancedBookmarksBridge, String query);
     private native void nativeSalientImageForUrl(long nativeEnhancedBookmarksBridge,
             String url, SalientImageCallback callback);
     private native void nativeFetchImageForTab(long nativeEnhancedBookmarksBridge,
             WebContents webContents);
+    private static native int nativeGetDefaultViewMode();
 }