cc: Rasterize cheap tiles immediately

cc/tile_manager.h

Index: cc/tile_manager.h
diff --git a/cc/tile_manager.h b/cc/tile_manager.h
index 1e0de2e89ced350643a96c53b08cec69573e42f4..38bf907e16e1f814403d111c29298f4ab1d30b6c 100644
--- a/cc/tile_manager.h
+++ b/cc/tile_manager.h
@@ -119,6 +119,7 @@ class CC_EXPORT TileManager : public WorkerPoolClient {
   void ManageTiles();
   void CheckForCompletedTileUploads();
   void AbortPendingTileUploads();
+  void DidCompleteFrame();
 
   scoped_ptr<base::Value> BasicStateAsValue() const;
   scoped_ptr<base::Value> AllTilesAsValue() const;
@@ -166,10 +167,9 @@ class CC_EXPORT TileManager : public WorkerPoolClient {
   void OnImageDecodeTaskCompleted(
       scoped_refptr<Tile> tile,
       uint32_t pixel_ref_id);
-  bool CanDispatchRasterTask(Tile* tile);
+  bool CanDispatchRasterTask(Tile* tile) const;
   scoped_ptr<ResourcePool::Resource> PrepareTileForRaster(Tile* tile);
   void DispatchOneRasterTask(scoped_refptr<Tile> tile);
-  void PerformOneRaster(Tile* tile);
   void OnRasterCompleted(
       scoped_refptr<Tile> tile,
       scoped_ptr<ResourcePool::Resource> resource,
@@ -192,7 +192,7 @@ class CC_EXPORT TileManager : public WorkerPoolClient {
                             const RasterTaskMetadata& raster_task_metadata,
                             PicturePileImpl* picture_pile,
                             RenderingStats* stats);
-  static void RunImageDecodeTask(skia::LazyPixelRef* pixel_ref,
+  static void PerformImageDecode(skia::LazyPixelRef* pixel_ref,
                                  RenderingStats* stats);
 
   static void RecordCheapnessPredictorResults(bool is_predicted_cheap,
@@ -231,6 +231,8 @@ class CC_EXPORT TileManager : public WorkerPoolClient {
   RenderingStats rendering_stats_;
 
   bool use_cheapness_estimator_;
+  bool did_schedule_cheap_tasks_;
+  bool allow_cheap_tasks_;
   int raster_state_count_[NUM_STATES][NUM_TREES][NUM_BINS];
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);