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

Source/core/loader/FrameLoaderClient.h

Index: Source/core/loader/FrameLoaderClient.h
diff --git a/Source/core/loader/FrameLoaderClient.h b/Source/core/loader/FrameLoaderClient.h
index a722e888759d5602e332560e618d076223a3240d..3045ba253bfc59f0aca1cb5aca951a511e1f09da 100644
--- a/Source/core/loader/FrameLoaderClient.h
+++ b/Source/core/loader/FrameLoaderClient.h
@@ -191,6 +191,10 @@ public:
 
     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*) { }