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 6d3cd29aefaefb8ebd634039b5ee8f52cb8669eb..e6826624b0cc46c1fd536119d97f6f44bcdabae5 100644
--- a/cc/tiles/image_decode_controller.h
+++ b/cc/tiles/image_decode_controller.h
@@ -12,6 +12,7 @@
 namespace cc {
 
 class ImageDecodeTask;
+class Task;
 
 // ImageDecodeController is responsible for generating decode tasks, decoding
 // images, storing images in cache, and being able to return the decoded images
@@ -67,6 +68,11 @@ 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 ImageDecodeTaskCompleted(Task* task) = 0;
+  virtual void ImageUploadTaskCompleted(Task* task) = 0;
 };
 
 }  // namespace cc