Move TaskGraph creation to TileManager

cc/raster/tile_task_worker_pool.h

Index: cc/raster/tile_task_worker_pool.h
diff --git a/cc/raster/tile_task_worker_pool.h b/cc/raster/tile_task_worker_pool.h
index 6657b9af057a9694def1d8cf83483068ad82faaa..6b550fa2f2da344215d4206065da1286c6cd3eef 100644
--- a/cc/raster/tile_task_worker_pool.h
+++ b/cc/raster/tile_task_worker_pool.h
@@ -19,40 +19,14 @@ class RenderingStatsInstrumentation;
 
 class CC_EXPORT TileTaskWorkerPool {
  public:
-  static size_t kBenchmarkTaskPriority;
-  static size_t kTaskSetFinishedTaskPriorityBase;
-  static size_t kTileTaskPriorityBase;
-
   TileTaskWorkerPool();
   virtual ~TileTaskWorkerPool();
 
-  // Utility function that can be used to create a "Task set finished" task that
-  // posts |callback| to |task_runner| when run.
-  static scoped_refptr<TileTask> CreateTaskSetFinishedTask(
-      base::SequencedTaskRunner* task_runner,
-      const base::Closure& callback);
-
   // Utility function that can be used to call ::ScheduleOnOriginThread() for
   // each task in |graph|.
   static void ScheduleTasksOnOriginThread(TileTaskClient* client,
                                           TaskGraph* graph);
 
-  // Utility function that can be used to build a task graph. Inserts a node
-  // that represents |task| in |graph|. See TaskGraph definition for valid
-  // |priority| values.
-  static void InsertNodeForTask(TaskGraph* graph,
-                                TileTask* task,
-                                size_t priority,
-                                size_t dependencies);
-
-  // Utility function that can be used to build a task graph. Inserts nodes that
-  // represent |task| and all its image decode dependencies in |graph|.
-  static void InsertNodesForRasterTask(
-      TaskGraph* graph,
-      RasterTask* task,
-      const ImageDecodeTask::Vector& decode_tasks,
-      size_t priority);
-
   // Utility function that will create a temporary bitmap and copy pixels to
   // |memory| when necessary. The |canvas_bitmap_rect| is the rect of the bitmap
   // being played back in the pixel space of the source, ie a rect in the source