cc: Send notification of tasks completion directly without scheduling.

cc/tiles/tile_manager.h

Index: cc/tiles/tile_manager.h
diff --git a/cc/tiles/tile_manager.h b/cc/tiles/tile_manager.h
index b522423415fd50d29a53ec3c5adb95b15f2a11b6..81af16e6851c378339255e1fcb16724ecd2ab817 100644
--- a/cc/tiles/tile_manager.h
+++ b/cc/tiles/tile_manager.h
@@ -268,22 +268,23 @@ class CC_EXPORT TileManager {
   bool TilePriorityViolatesMemoryPolicy(const TilePriority& priority);
   bool AreRequiredTilesReadyToDraw(RasterTilePriorityQueue::Type type) const;
   void CheckIfMoreTilesNeedToBePrepared();
-  void CheckAndIssueSignals();
+  void CheckAndNotifyReadyToActivate();
+  void CheckAndNotifyReadyToDraw();
+  void CheckAndNotifyAllTileTasksCompleted();
   bool MarkTilesOutOfMemory(
       std::unique_ptr<RasterTilePriorityQueue> queue) const;
 
   ResourceFormat DetermineResourceFormat(const Tile* tile) const;
   bool DetermineResourceRequiresSwizzle(const Tile* tile) const;
 
-  void DidFinishRunningTileTasksRequiredForActivation();
-  void DidFinishRunningTileTasksRequiredForDraw();
-  void DidFinishRunningAllTileTasks();
+  void DidFinishRunningTileTasksRequiredForActivation(
+      uint64_t source_prepare_tiles_id);
+  void DidFinishRunningTileTasksRequiredForDraw(
+      uint64_t source_prepare_tiles_id);
+  void DidFinishRunningAllTileTasks(uint64_t source_prepare_tiles_id);
 
   scoped_refptr<TileTask> CreateTaskSetFinishedTask(
-      void (TileManager::*callback)());
-
-  std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
-  ScheduledTasksStateAsValue() const;
+      void (TileManager::*callback)(uint64_t source_prepare_tiles_id));
 
   TileManagerClient* client_;
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
@@ -316,23 +317,6 @@ class CC_EXPORT TileManager {
   scoped_refptr<TileTask> required_for_draw_done_task_;
   scoped_refptr<TileTask> all_done_task_;
 
-  UniqueNotifier more_tiles_need_prepare_check_notifier_;
-
-  struct Signals {
-    Signals();
-
-    void reset();
-
-    bool ready_to_activate;
-    bool did_notify_ready_to_activate;
-    bool ready_to_draw;
-    bool did_notify_ready_to_draw;
-    bool all_tile_tasks_completed;
-    bool did_notify_all_tile_tasks_completed;
-  } signals_;
-
-  UniqueNotifier signals_check_notifier_;
-
   bool has_scheduled_tile_tasks_;
 
   uint64_t prepare_tiles_count_;