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 35 matching lines @@
 // by layers; they automatically register with the manager when they are
 // created, and unregister from the manager when they are deleted.
 class CC_EXPORT TileManager : public RasterWorkerPoolClient {
  public:
   static scoped_ptr<TileManager> Create(
       TileManagerClient* client,
       ResourceProvider* resource_provider,
       size_t num_raster_threads,
       RenderingStatsInstrumentation* rendering_stats_instrumentation,
       bool use_map_image,
-      size_t max_transfer_buffer_usage_bytes);
+      size_t max_transfer_buffer_usage_bytes,
+      bool use_rgba_4444_tiles);
   virtual ~TileManager();
 
   const GlobalStateThatImpactsTilePriority& GlobalState() const {
       return global_state_;
   }
   void SetGlobalState(const GlobalStateThatImpactsTilePriority& state);
 
   void ManageTiles();
 
   // Returns true when visible tiles have been initialized.
@@ skipping 29 matching lines @@
   }
   RasterWorkerPool* RasterWorkerPoolForTesting() {
     return raster_worker_pool_.get();
   }
 
  protected:
   TileManager(TileManagerClient* client,
               ResourceProvider* resource_provider,
               scoped_ptr<RasterWorkerPool> raster_worker_pool,
               size_t num_raster_threads,
-              RenderingStatsInstrumentation* rendering_stats_instrumentation);
+              RenderingStatsInstrumentation* rendering_stats_instrumentation,
+              ResourceProvider::TextureFormat texture_type);
 
   // Methods called by Tile
   friend class Tile;
   void RegisterTile(Tile* tile);
   void UnregisterTile(Tile* tile);
   void DidChangeTilePriority(Tile* tile);
 
   // Overriden from RasterWorkerPoolClient:
   virtual bool ShouldForceTasksRequiredForActivationToComplete() const
       OVERRIDE;
@@ skipping 59 matching lines @@
   bool did_initialize_visible_tile_;
 
   typedef base::hash_map<uint32_t, RasterWorkerPool::Task> PixelRefTaskMap;
   typedef base::hash_map<int, PixelRefTaskMap> LayerPixelRefTaskMap;
   LayerPixelRefTaskMap image_decode_tasks_;
 
   typedef base::hash_map<int, int> LayerCountMap;
   LayerCountMap used_layer_counts_;
 
   RasterTaskCompletionStats update_visible_tiles_stats_;
+  ResourceProvider::TextureFormat texture_type_;
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TILE_MANAGER_H_