Replicate sandbox flags for OOPIF (Blink part 2)

Source/core/html/HTMLFrameOwnerElement.cpp

 /*
  * 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 168 matching lines @@
 DOMWindow* HTMLFrameOwnerElement::contentWindow() const
 {
     return m_contentFrame ? m_contentFrame->domWindow() : 0;
 }
 
 void HTMLFrameOwnerElement::setSandboxFlags(SandboxFlags flags)
 {
     m_sandboxFlags = flags;
 }
 
-SandboxFlags HTMLFrameOwnerElement::sandboxFlags() const
-{
-    return m_sandboxFlags | document().sandboxFlags();
-}
-
 bool HTMLFrameOwnerElement::isKeyboardFocusable() const
 {
     return m_contentFrame && HTMLElement::isKeyboardFocusable();
 }
 
 void HTMLFrameOwnerElement::dispatchLoad()
 {
     dispatchEvent(Event::create(EventTypeNames::load));
 }
 
@@ skipping 61 matching lines @@
 void HTMLFrameOwnerElement::trace(Visitor* visitor)
 {
     visitor->trace(m_contentFrame);
     visitor->trace(m_widget);
     HTMLElement::trace(visitor);
     FrameOwner::trace(visitor);
 }
 
 
 } // namespace blink