Move TaskGraph creation to TileManager

cc/raster/bitmap_tile_task_worker_pool.h

Index: cc/raster/bitmap_tile_task_worker_pool.h
diff --git a/cc/raster/bitmap_tile_task_worker_pool.h b/cc/raster/bitmap_tile_task_worker_pool.h
index fe9c4e81087f6d5982b1ef069882d6943cfda84e..f53768f11ba90e6649eee5bcb7329920d7733417 100644
--- a/cc/raster/bitmap_tile_task_worker_pool.h
+++ b/cc/raster/bitmap_tile_task_worker_pool.h
@@ -5,7 +5,6 @@
 #ifndef CC_RASTER_BITMAP_TILE_TASK_WORKER_POOL_H_
 #define CC_RASTER_BITMAP_TILE_TASK_WORKER_POOL_H_
 
-#include "base/memory/weak_ptr.h"
 #include "base/values.h"
 #include "cc/raster/tile_task_runner.h"
 #include "cc/raster/tile_task_worker_pool.h"
@@ -34,9 +33,8 @@ class CC_EXPORT BitmapTileTaskWorkerPool : public TileTaskWorkerPool,
   TileTaskRunner* AsTileTaskRunner() override;
 
   // Overridden from TileTaskRunner:
-  void SetClient(TileTaskRunnerClient* client) override;
   void Shutdown() override;
-  void ScheduleTasks(TileTaskQueue* queue) override;
+  void ScheduleTasks(TaskGraph* graph) override;
   void CheckForCompletedTasks() override;
   ResourceFormat GetResourceFormat(bool must_support_alpha) const override;
   bool GetResourceRequiresSwizzle(bool must_support_alpha) const override;
@@ -54,28 +52,16 @@ class CC_EXPORT BitmapTileTaskWorkerPool : public TileTaskWorkerPool,
                            ResourceProvider* resource_provider);
 
  private:
-  void OnTaskSetFinished(TaskSet task_set);
   scoped_refptr<base::trace_event::ConvertableToTraceFormat> StateAsValue()
       const;
 
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   TaskGraphRunner* task_graph_runner_;
   const NamespaceToken namespace_token_;
-  TileTaskRunnerClient* client_;
   ResourceProvider* resource_provider_;
 
-  TaskSetCollection tasks_pending_;
-
-  scoped_refptr<TileTask> task_set_finished_tasks_[kNumberOfTaskSets];
-
-  // Task graph used when scheduling tasks and vector used to gather
-  // completed tasks.
-  TaskGraph graph_;
   Task::Vector completed_tasks_;
 
-  base::WeakPtrFactory<BitmapTileTaskWorkerPool>
-      task_set_finished_weak_ptr_factory_;
-
   DISALLOW_COPY_AND_ASSIGN(BitmapTileTaskWorkerPool);
 };