OOPIF: Replicate allowFullscreen flag.

third_party/WebKit/Source/core/dom/Fullscreen.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
@@ skipping 40 matching lines @@
 namespace blink {
 
 using namespace HTMLNames;
 
 static bool fullscreenIsAllowedForAllOwners(const Document& document)
 {
     if (!document.frame())
         return false;
 
     for (const Frame* frame = document.frame(); frame->owner(); frame = frame->tree().parent()) {
-        // TODO(alexmos): The allowfullscreen attribute will need to be
-        // replicated for this to work with OOPIFs.  For now, deny fullscreen
-        // access inside OOPIFs until https://crbug.com/550497 is fixed.
-        if (frame->owner()->isRemote())
-            return false;
-
-        HTMLFrameOwnerElement* owner = toHTMLFrameOwnerElement(frame->owner());
-        if (!isHTMLIFrameElement(owner))
-            return false;
-        if (!owner->hasAttribute(allowfullscreenAttr))
+        if (!frame->owner()->allowFullscreen())
             return false;
     }
     return true;
 }
 
 static bool fullscreenIsSupported(const Document& document)
 {
     // Fullscreen is supported if there is no previously-established user preference,
     // security risk, or platform limitation.
     return !document.settings() || document.settings()->fullscreenSupported();
@@ skipping 527 matching lines @@
 DEFINE_TRACE(Fullscreen)
 {
     visitor->trace(m_fullScreenElement);
     visitor->trace(m_fullScreenElementStack);
     visitor->trace(m_eventQueue);
     Supplement<Document>::trace(visitor);
     ContextLifecycleObserver::trace(visitor);
 }
 
 } // namespace blink