cc: Remove ScheduleOnOriginThread() and CompleteOnOriginThread().

cc/tiles/gpu_image_decode_controller.h

Index: cc/tiles/gpu_image_decode_controller.h
diff --git a/cc/tiles/gpu_image_decode_controller.h b/cc/tiles/gpu_image_decode_controller.h
index 6a9d200a2828234bf4e7cc2c33415836faf48804..2e37690eb9234c356756d121c2ea33457b3d940c 100644
--- a/cc/tiles/gpu_image_decode_controller.h
+++ b/cc/tiles/gpu_image_decode_controller.h
@@ -80,8 +80,10 @@ class CC_EXPORT GpuImageDecodeController
   // Called by Decode / Upload tasks.
   void DecodeImage(const DrawImage& image);
   void UploadImage(const DrawImage& image);
-  void DecodeTaskCompleted(const DrawImage& image);
-  void UploadTaskCompleted(const DrawImage& image);
+
+  // Called by Decode / Upload tasks when tasks are finished.
+  void OnImageDecodeTaskCompleted(const DrawImage& image);
+  void OnImageUploadTaskCompleted(const DrawImage& image);
 
   // For testing only.
   void SetCachedItemLimitForTesting(size_t limit) {