cc: Change tile manager to have a raw ptr for the task runner.

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 78 matching lines @@
 std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
 RasterTaskCompletionStatsAsValue(const RasterTaskCompletionStats& stats);
 
 // This class manages tiles, deciding which should get rasterized and which
 // should no longer have any memory assigned to them. Tile objects are "owned"
 // by layers; they automatically register with the manager when they are
 // created, and unregister from the manager when they are deleted.
 class CC_EXPORT TileManager {
  public:
   TileManager(TileManagerClient* client,
-              scoped_refptr<base::SequencedTaskRunner> task_runner,
+              base::SequencedTaskRunner* task_runner,
               size_t scheduled_raster_task_limit,
               bool use_partial_raster);
   virtual ~TileManager();
 
   // Assigns tile memory and schedules work to prepare tiles for drawing.
   // - Runs client_->NotifyReadyToActivate() when all tiles required for
   // activation are prepared, or failed to prepare due to OOM.
   // - Runs client_->NotifyReadyToDraw() when all tiles required draw are
   // prepared, or failed to prepare due to OOM.
   bool PrepareTiles(const GlobalStateThatImpactsTilePriority& state);
@@ skipping 154 matching lines @@
   void DidFinishRunningAllTileTasks();
 
   scoped_refptr<TileTask> CreateTaskSetFinishedTask(
       void (TileManager::*callback)());
   std::vector<PrioritizedTile> AssignGpuMemoryToTiles();
 
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
   ScheduledTasksStateAsValue() const;
 
   TileManagerClient* client_;
-  scoped_refptr<base::SequencedTaskRunner> task_runner_;
+  base::SequencedTaskRunner* task_runner_;
   ResourcePool* resource_pool_;
   TileTaskManager* tile_task_manager_;
   GlobalStateThatImpactsTilePriority global_state_;
   size_t scheduled_raster_task_limit_;
   const bool use_partial_raster_;
   bool use_gpu_rasterization_;
 
   std::unordered_map<Tile::Id, Tile*> tiles_;
 
   bool all_tiles_that_need_to_be_rasterized_are_scheduled_;
@@ skipping 40 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_