[Reland] Post loading tasks on the appropriate WebFrameScheduler's queue

content/test/mock_weburlloader.h

Index: content/test/mock_weburlloader.h
diff --git a/content/test/mock_weburlloader.h b/content/test/mock_weburlloader.h
index db26111a27d1f1aad8239f575c552dee6be892a1..4b96ed3d597717d9f91f2ebad15d0afe458a295f 100644
--- a/content/test/mock_weburlloader.h
+++ b/content/test/mock_weburlloader.h
@@ -23,6 +23,8 @@ class MockWebURLLoader : public blink::WebURLLoader {
                                         blink::WebURLLoaderClient* client));
   MOCK_METHOD0(cancel, void());
   MOCK_METHOD1(setDefersLoading, void(bool value));
+  MOCK_METHOD1(setLoadingTaskRunner,
+               void(blink::WebTaskRunner* loading_task_runner));
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockWebURLLoader);