WebFrame exports size information for remote frames.

public/web/WebFrameClient.h

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 360 matching lines @@
 
     // Notifies the client that a WebGL context was lost on this page with the
     // given reason (one of the GL_ARB_robustness status codes; see
     // Extensions3D.h in WebCore/platform/graphics).
     virtual void didLoseWebGLContext(WebFrame*, int) { }
 
     // FIXME: Remove this method once we have input routing in the browser
     // process. See http://crbug.com/339659.
     virtual void forwardInputEvent(const WebInputEvent*) { }
 
+    // Send initial drawing parameters to a child frame that is being rendered out of process.
+    virtual void initializeChildFrame(const WebRect& frameRect, float scaleFactor) { }
+
 protected:
     ~WebFrameClient() { }
 };
 
 } // namespace blink
 
 #endif