cc: Refactor TileTaskWorkerPool.

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 9542d0264ae86b786811c1cd57c2aa6690238079..5c66b9247725af4be4129f7f4309aeb19744b7ff 100644
--- a/cc/raster/tile_task_worker_pool.h
+++ b/cc/raster/tile_task_worker_pool.h
@@ -20,22 +20,12 @@ class SequencedTaskRunner;
 }
 
 namespace cc {
-class RenderingStatsInstrumentation;
 
-// This class provides the wrapper over TaskGraphRunner for scheduling and
-// collecting tasks. The client can call CheckForCompletedTasks() at any time to
-// process all completed tasks at the moment that have finished running or
-// cancelled.
 class CC_EXPORT TileTaskWorkerPool {
  public:
   TileTaskWorkerPool();
   virtual ~TileTaskWorkerPool();
 
-  // Utility function that can be used to call ::ScheduleOnOriginThread() for
-  // each task in |graph|.
-  static void ScheduleTasksOnOriginThread(RasterBufferProvider* provider,
-                                          TaskGraph* graph);
-
   // 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
@@ -53,20 +43,8 @@ class CC_EXPORT TileTaskWorkerPool {
       float scale,
       const RasterSource::PlaybackSettings& playback_settings);
 
-  // Tells the worker pool to shutdown after canceling all previously scheduled
-  // tasks. Reply callbacks are still guaranteed to run when
-  // CheckForCompletedTasks() is called.
-  virtual void Shutdown() = 0;
-
-  // Schedule running of tile tasks in |graph| and all dependencies.
-  // Previously scheduled tasks that are not in |graph| will be canceled unless
-  // already running. Once scheduled, reply callbacks are guaranteed to run for
-  // all tasks even if they later get canceled by another call to
-  // ScheduleTasks().
-  virtual void ScheduleTasks(TaskGraph* graph) = 0;
-
-  // Check for completed tasks and dispatch reply callbacks.
-  virtual void CheckForCompletedTasks() = 0;
+  // Barrier to sync any new resources to the worker context.
+  virtual void BarrierToSyncResources() = 0;
 
   // Returns the format to use for the tiles.
   virtual ResourceFormat GetResourceFormat(bool must_support_alpha) const = 0;