OOPIF: Replicate allowFullscreen flag.

third_party/WebKit/Source/core/html/HTMLIFrameElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann (hausmann@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Ericsson AB. 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
@@ skipping 86 matching lines @@
             document.addExtraNamedItem(value);
         }
         m_name = value;
     } else if (name == sandboxAttr) {
         m_sandbox->setValue(value);
         UseCounter::count(document(), UseCounter::SandboxViaIFrame);
     } else if (name == referrerpolicyAttr) {
         m_referrerPolicy = ReferrerPolicyDefault;
         if (!value.isNull())
             SecurityPolicy::referrerPolicyFromString(value, &m_referrerPolicy);
+    } else if (name == allowfullscreenAttr) {
+        bool oldAllowFullscreen = m_allowFullscreen;
+        m_allowFullscreen = !value.isNull();
+        if (m_allowFullscreen != oldAllowFullscreen)
+            frameOwnerPropertiesChanged();
     } else {
         if (name == srcAttr)
             logUpdateAttributeIfIsolatedWorldAndInDocument("iframe", srcAttr, oldValue, value);
         HTMLFrameElementBase::parseAttribute(name, oldValue, value);
     }
 }
 
 bool HTMLIFrameElement::layoutObjectIsNeeded(const ComputedStyle& style)
 {
     return isURLAllowed() && HTMLElement::layoutObjectIsNeeded(style);
@@ skipping 32 matching lines @@
     if (!invalidTokens.isNull())
         document().addConsoleMessage(ConsoleMessage::create(OtherMessageSource, ErrorMessageLevel, "Error while parsing the 'sandbox' attribute: " + invalidTokens));
     setSynchronizedLazyAttribute(sandboxAttr, m_sandbox->value());
 }
 
 ReferrerPolicy HTMLIFrameElement::referrerPolicyAttribute()
 {
     return m_referrerPolicy;
 }
 } // namespace blink