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

Source/core/html/HTMLFrameElementBase.h

Index: Source/core/html/HTMLFrameElementBase.h
diff --git a/Source/core/html/HTMLFrameElementBase.h b/Source/core/html/HTMLFrameElementBase.h
index cac0f27c2cc58ae0125b5c3ed18f129fad98c2c1..45f56b348a5eaeb6fb69d4eecd328d11ba533b33 100644
--- a/Source/core/html/HTMLFrameElementBase.h
+++ b/Source/core/html/HTMLFrameElementBase.h
@@ -31,11 +31,6 @@ namespace blink {
 
 class HTMLFrameElementBase : public HTMLFrameOwnerElement {
 public:
-    ScrollbarMode scrollingMode() const final { return m_scrolling; }
-
-    int marginWidth() const { return m_marginWidth; }
-    int marginHeight() const { return m_marginHeight; }
-
     bool canContainRangeEndPoint() const final { return false; }
 
 protected:
@@ -68,11 +63,6 @@ private:
 
     AtomicString m_URL;
     AtomicString m_frameName;
-
-    ScrollbarMode m_scrolling;
-
-    int m_marginWidth;
-    int m_marginHeight;
 };
 
 inline bool isHTMLFrameElementBase(const HTMLElement& element)