cc: Remove ScheduleOnOriginThread() and CompleteOnOriginThread().

cc/tiles/image_decode_controller.h

Index: cc/tiles/image_decode_controller.h
diff --git a/cc/tiles/image_decode_controller.h b/cc/tiles/image_decode_controller.h
index 10e93988ef9cd14fe351280bcfd2e60b5fd2550d..7d3f9346aeff116d1b53e1bf8e614652d7a72586 100644
--- a/cc/tiles/image_decode_controller.h
+++ b/cc/tiles/image_decode_controller.h
@@ -84,6 +84,11 @@ class CC_EXPORT ImageDecodeController {
   // retaining cached resources longer than needed.
   virtual void SetShouldAggressivelyFreeResources(
       bool aggressively_free_resources) = 0;
+
+  // These functions process completion of image decode/upload tasks on origin
+  // thread (i.e. on the compositor thread called by the tile manager).
+  virtual void OnImageDecodeTaskCompleted(TileTask* task) = 0;
+  virtual void OnImageUploadTaskCompleted(TileTask* task) = 0;
 };
 
 }  // namespace cc