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

Source/core/html/HTMLFrameOwnerElement.h

 /*
  * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 41 matching lines @@
 
     virtual void disconnectContentFrame();
 
     // Most subclasses use LayoutPart (either LayoutEmbeddedObject or LayoutIFrame)
     // except for HTMLObjectElement and HTMLEmbedElement which may return any
     // LayoutObject when using fallback content.
     LayoutPart* layoutPart() const;
 
     Document* getSVGDocument(ExceptionState&) const;
 
-    virtual ScrollbarMode scrollingMode() const { return ScrollbarAuto; }
-
     virtual bool loadedNonEmptyDocument() const { return false; }
     virtual void didLoadNonEmptyDocument() { }
 
     void setWidget(PassRefPtrWillBeRawPtr<Widget>);
     Widget* ownedWidget() const;
 
     class UpdateSuspendScope {
         STACK_ALLOCATED();
     public:
         UpdateSuspendScope();
         ~UpdateSuspendScope();
 
     private:
         void performDeferredWidgetTreeOperations();
     };
 
     // FrameOwner overrides:
     bool isLocal() const override { return true; }
     void dispatchLoad() override;
     SandboxFlags sandboxFlags() const override { return m_sandboxFlags; }
     void renderFallbackContent() override { }
+    ScrollbarMode scrollingMode() const override { return m_scrollingMode; }
+    int marginWidth() const override { return m_marginWidth; }
+    int marginHeight() const override { return m_marginHeight; }
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     HTMLFrameOwnerElement(const QualifiedName& tagName, Document&);
     void setSandboxFlags(SandboxFlags);
+    void setScrollingMode(ScrollbarMode);
+    void setMarginWidth(int);
+    void setMarginHeight(int);
 
     bool loadOrRedirectSubframe(const KURL&, const AtomicString& frameName, bool replaceCurrentItem);
 
 private:
     bool isKeyboardFocusable() const override;
     bool isFrameOwnerElement() const final { return true; }
 
     virtual ReferrerPolicy referrerPolicyAttribute() { return ReferrerPolicyDefault; }
 
+    void frameOwnerPropertiesChanged();
+
     RawPtrWillBeMember<Frame> m_contentFrame;
     RefPtrWillBeMember<Widget> m_widget;
     SandboxFlags m_sandboxFlags;
+    ScrollbarMode m_scrollingMode;
+    int m_marginWidth;
+    int m_marginHeight;
 };
 
 DEFINE_ELEMENT_TYPE_CASTS(HTMLFrameOwnerElement, isFrameOwnerElement());
 
 class SubframeLoadingDisabler {
     STACK_ALLOCATED();
 public:
     explicit SubframeLoadingDisabler(Node& root)
         : m_root(root)
     {
@@ skipping 20 matching lines @@
     static WillBeHeapHashCountedSet<RawPtrWillBeMember<Node>>& disabledSubtreeRoots();
 
     RawPtrWillBeMember<Node> m_root;
 };
 
 DEFINE_TYPE_CASTS(HTMLFrameOwnerElement, FrameOwner, owner, owner->isLocal(), owner.isLocal());
 
 } // namespace blink
 
 #endif // HTMLFrameOwnerElement_h