cc: Remove ScheduleOnOriginThread() and CompleteOnOriginThread().

cc/raster/tile_task.h

Index: cc/raster/tile_task.h
diff --git a/cc/raster/tile_task.h b/cc/raster/tile_task.h
index 7b0f84e44dd558617987feb7cb3d388e134e830e..3ab1c73b0992981375a06e23a59ad511e51bec89 100644
--- a/cc/raster/tile_task.h
+++ b/cc/raster/tile_task.h
@@ -10,7 +10,6 @@
 #include "cc/raster/task.h"
 
 namespace cc {
-class RasterBufferProvider;
 
 class CC_EXPORT TileTask : public Task {
  public:
@@ -25,16 +24,9 @@ class CC_EXPORT TileTask : public Task {
     return supports_concurrent_execution_;
   }
 
-  virtual void ScheduleOnOriginThread(RasterBufferProvider* provider) = 0;
-  virtual void CompleteOnOriginThread(RasterBufferProvider* provider) = 0;
-
-  void WillSchedule();
-  void DidSchedule();
-  bool HasBeenScheduled() const;
-
-  void WillComplete();
-  void DidComplete();
-  bool HasCompleted() const;
+  // This function should be called from origin thread to process the completion
+  // of the task.
+  virtual void OnTaskCompleted() = 0;
 
  protected:
   explicit TileTask(bool supports_concurrent_execution);
@@ -43,8 +35,6 @@ class CC_EXPORT TileTask : public Task {
 
   const bool supports_concurrent_execution_;
   TileTask::Vector dependencies_;
-  bool did_schedule_;
-  bool did_complete_;
 };
 
 }  // namespace cc