diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 846717d..3c8ad0bd 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -312,7 +312,7 @@
   // depend on the frame being at its proper spot.
   //
   // Virtual for web tests to inject their own behaviour into the WebLocalFrame.
-  virtual void Initialize();
+  virtual void Initialize(blink::WebFrame* parent);
 
   // Notifications from RenderWidget.
   void WasHidden();