cc: Add image decode control in the compositor.

cc/tiles/tile_manager.h

Index: cc/tiles/tile_manager.h
diff --git a/cc/tiles/tile_manager.h b/cc/tiles/tile_manager.h
index abffc7cb5998794580de7a4956646a0ea6e40ff3..0d3be5ec880da28f8de901ff009ba12e21d76b22 100644
--- a/cc/tiles/tile_manager.h
+++ b/cc/tiles/tile_manager.h
@@ -128,7 +128,8 @@ class CC_EXPORT TileManager : public TileTaskRunnerClient {
   // SetResources.
   void SetResources(ResourcePool* resource_pool,
                     TileTaskRunner* tile_task_runner,
-                    size_t scheduled_raster_task_limit);
+                    size_t scheduled_raster_task_limit,
+                    bool is_using_gpu_rasterization);
 
   // This causes any completed raster work to finalize, so that tiles get up to
   // date draw information.
@@ -142,6 +143,10 @@ class CC_EXPORT TileManager : public TileTaskRunnerClient {
   bool IsReadyToActivate() const;
   bool IsReadyToDraw() const;
 
+  ImageDecodeController* GetImageDecodeController() {
+    return &image_decode_controller_;
+  }
+
   scoped_refptr<base::trace_event::ConvertableToTraceFormat> BasicStateAsValue()
       const;
   void BasicStateAsValueInto(base::trace_event::TracedValue* dict) const;
@@ -338,6 +343,8 @@ class CC_EXPORT TileManager : public TileTaskRunnerClient {
   uint64_t prepare_tiles_count_;
   uint64_t next_tile_id_;
 
+  base::hash_map<Tile::Id, std::vector<DrawImage>> scheduled_draw_images_;
+
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };