Propagate scrolling/marginwidth/marginheight property values to child frame.

third_party/WebKit/Source/core/html/HTMLFrameOwnerElement.h

Index: third_party/WebKit/Source/core/html/HTMLFrameOwnerElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLFrameOwnerElement.h b/third_party/WebKit/Source/core/html/HTMLFrameOwnerElement.h
index 48e2101ee1d53cc6da8ed551032f82126a9e3b92..f5c9ec47fc3e3a31b225b44516c58e1d7094a2a6 100644
--- a/third_party/WebKit/Source/core/html/HTMLFrameOwnerElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLFrameOwnerElement.h
@@ -59,8 +59,6 @@ public:
 
     Document* getSVGDocument(ExceptionState&) const;
 
-    virtual ScrollbarMode scrollingMode() const { return ScrollbarAuto; }
-
     virtual bool loadedNonEmptyDocument() const { return false; }
     virtual void didLoadNonEmptyDocument() { }
 
@@ -83,6 +81,9 @@ public:
     void dispatchLoad() override;
     SandboxFlags sandboxFlags() const override { return m_sandboxFlags; }
     void renderFallbackContent() override { }
+    ScrollbarMode scrollingMode() const override { return ScrollbarAuto; }
+    int marginWidth() const override { return -1; }
+    int marginHeight() const override { return -1; }
 
     DECLARE_VIRTUAL_TRACE();