cc: Adding support for RGBA_4444 tile textures

cc/resources/tile_manager.h

Index: cc/resources/tile_manager.h
diff --git a/cc/resources/tile_manager.h b/cc/resources/tile_manager.h
index 1ac2689f9bdbbe52bc6516ef924847e478bc5618..9fc7fd2427123ec58dce4f42a39877bdf009f1a0 100644
--- a/cc/resources/tile_manager.h
+++ b/cc/resources/tile_manager.h
@@ -53,7 +53,8 @@ class CC_EXPORT TileManager : public RasterWorkerPoolClient {
       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 {
@@ -103,7 +104,8 @@ class CC_EXPORT TileManager : public RasterWorkerPoolClient {
               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;
@@ -183,6 +185,7 @@ class CC_EXPORT TileManager : public RasterWorkerPoolClient {
   LayerCountMap used_layer_counts_;
 
   RasterTaskCompletionStats update_visible_tiles_stats_;
+  ResourceProvider::TextureFormat texture_type_;
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };