cc: Ensure members needed on task completion get called on valid thread.

cc/tiles/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_TILES_TILE_MANAGER_H_
 #define CC_TILES_TILE_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 179 matching lines @@
   }
 
   void SetMoreTilesNeedToBeRasterizedForTesting() {
     all_tiles_that_need_to_be_rasterized_are_scheduled_ = false;
   }
 
   bool HasScheduledTileTasksForTesting() const {
     return has_scheduled_tile_tasks_;
   }
 
-  void OnRasterTaskCompleted(std::unique_ptr<RasterBuffer> raster_buffer,
-                             Tile* tile,
-                             Resource* resource,
-                             bool was_canceled);
+  static void OnRasterTaskCompleted(
+      std::unique_ptr<RasterBuffer> raster_buffer,
+      TileTask::TaskCompletionInfo* completion_info,
+      bool was_canceled);
 
  protected:
   TileManager(TileManagerClient* client,
               scoped_refptr<base::SequencedTaskRunner> task_runner,
               size_t scheduled_raster_task_limit,
               bool use_partial_raster);
 
   void FreeResourcesForReleasedTiles();
   void CleanUpReleasedTiles();
 
@@ skipping 127 matching lines @@
   std::unordered_map<Tile::Id, std::vector<DrawImage>> scheduled_draw_images_;
 
   base::WeakPtrFactory<TileManager> task_set_finished_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_TILE_MANAGER_H_