(blink) Propagate scrolling/marginwidth/marginheight property values to child frame.

Source/core/loader/FrameLoaderClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 173 matching lines @@
     virtual void didNotAllowScript() { }
     // This callback is similar, but for plugins.
     virtual void didNotAllowPlugins() { }
 
     virtual WebCookieJar* cookieJar() const = 0;
 
     virtual void didChangeName(const String&) { }
 
     virtual void didChangeSandboxFlags(Frame* childFrame, SandboxFlags) { }
 
+    virtual void didChangeScrollingMode(Frame*, ScrollbarMode) { }
+    virtual void didChangeMarginWidth(Frame*, int) { }
+    virtual void didChangeMarginHeight(Frame*, int) { }
+
     virtual void dispatchWillOpenWebSocket(WebSocketHandle*) { }
 
     virtual void dispatchWillStartUsingPeerConnectionHandler(WebRTCPeerConnectionHandler*) { }
 
     virtual void didRequestAutocomplete(HTMLFormElement*) = 0;
 
     virtual bool allowWebGL(bool enabledPerSettings) { return enabledPerSettings; }
     // Informs the embedder that a WebGL canvas inside this frame received a lost context
     // notification with the given GL_ARB_robustness guilt/innocence code (see Extensions3D.h).
     virtual void didLoseWebGLContext(int) { }
@@ skipping 28 matching lines @@
         BeforeUnloadHandler,
         UnloadHandler,
     };
     virtual void suddenTerminationDisablerChanged(bool present, SuddenTerminationDisablerType) { }
 
 };
 
 } // namespace blink
 
 #endif // FrameLoaderClient_h