cc: Remove ScheduleOnOriginThread() and CompleteOnOriginThread().

cc/tiles/software_image_decode_controller.h

Index: cc/tiles/software_image_decode_controller.h
diff --git a/cc/tiles/software_image_decode_controller.h b/cc/tiles/software_image_decode_controller.h
index a94c45f7071a0b80c26d03d771667df2d75651d0..9acf97c27ffe57c8e7b45fb45f6d3503d355fc7b 100644
--- a/cc/tiles/software_image_decode_controller.h
+++ b/cc/tiles/software_image_decode_controller.h
@@ -119,6 +119,8 @@ class CC_EXPORT SoftwareImageDecodeController
   // Software doesn't keep outstanding images pinned, so this is a no-op.
   void SetShouldAggressivelyFreeResources(
       bool aggressively_free_resources) override {}
+  void ImageDecodeTaskCompleted(Task* task) override;
+  void ImageUploadTaskCompleted(Task* task) override {}
 
   // Decode the given image and store it in the cache. This is only called by an
   // image decode task from a worker thread.