cc: Adding support for RGBA_4444 tile textures

cc/resources/tile_manager.h

 // Copyright 2012 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.
 
 #ifndef CC_RESOURCES_TILE_MANAGER_H_
 #define CC_RESOURCES_TILE_MANAGER_H_
 
 #include <queue>
 #include <set>
 #include <vector>
@@ skipping 144 matching lines @@
 
   bool did_initialize_visible_tile_;
 
   GLenum texture_format_;
 
   typedef base::hash_map<uint32_t, RasterWorkerPool::Task> PixelRefTaskMap;
   typedef base::hash_map<int, PixelRefTaskMap> LayerPixelRefTaskMap;
   LayerPixelRefTaskMap image_decode_tasks_;
 
   RasterTaskCompletionStats update_visible_tiles_stats_;
+  bool use_16bit_tiles_;
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TILE_MANAGER_H_