cc: Adding support for RGBA_4444 tile textures

cc/layers/tiled_layer.h

 // Copyright 2011 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_LAYERS_TILED_LAYER_H_
 #define CC_LAYERS_TILED_LAYER_H_
 
 #include "cc/base/cc_export.h"
 #include "cc/layers/contents_scaling_layer.h"
 #include "cc/resources/layer_tiling_data.h"
+#include "cc/resources/resource_format.h"
 
 namespace cc {
 class LayerUpdater;
 class PrioritizedResourceManager;
 class PrioritizedResource;
 class UpdatableTile;
 
 class CC_EXPORT TiledLayer : public ContentsScalingLayer {
  public:
   enum TilingOption {
@@ skipping 17 matching lines @@
 
  protected:
   TiledLayer();
   virtual ~TiledLayer();
 
   void UpdateTileSizeAndTilingOption();
   void UpdateBounds();
 
   // Exposed to subclasses for testing.
   void SetTileSize(gfx::Size size);
-  void SetTextureFormat(unsigned texture_format) {
+  void SetTextureFormat(ResourceFormat texture_format) {
     texture_format_ = texture_format;
   }
   void SetBorderTexelOption(LayerTilingData::BorderTexelOption option);
   size_t NumPaintedTiles() { return tiler_->tiles().size(); }
 
   virtual LayerUpdater* Updater() const = 0;
   virtual void CreateUpdaterIfNeeded() = 0;
 
   // Set invalidations to be potentially repainted during Update().
   void InvalidateContentRect(gfx::Rect content_rect);
@@ skipping 54 matching lines @@
                           int bottom,
                           ResourceUpdateQueue* queue,
                           const OcclusionTracker* occlusion);
   void UpdateScrollPrediction();
 
   UpdatableTile* TileAt(int i, int j) const;
   UpdatableTile* CreateTile(int i, int j);
 
   bool IsSmallAnimatedLayer() const;
 
-  unsigned texture_format_;
+  ResourceFormat texture_format_;
   bool skips_draw_;
   bool failed_update_;
 
   // Used for predictive painting.
   gfx::Vector2d predicted_scroll_;
   gfx::Rect predicted_visible_rect_;
   gfx::Rect previous_visible_rect_;
   gfx::Size previous_content_bounds_;
 
   TilingOption tiling_option_;
   scoped_ptr<LayerTilingData> tiler_;
 
   DISALLOW_COPY_AND_ASSIGN(TiledLayer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_TILED_LAYER_H_