Implement the unprefixed the Fullscreen API

Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013 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
@@ skipping 444 matching lines @@
     virtual bool isDisabledFormControl() const { return false; }
 
     bool hasPendingResources() const { return hasElementFlag(HasPendingResources); }
     void setHasPendingResources() { setElementFlag(HasPendingResources); }
     void clearHasPendingResources() { clearElementFlag(HasPendingResources); }
     virtual void buildPendingResource() { };
 
     void setCustomElementDefinition(PassRefPtr<CustomElementDefinition>);
     CustomElementDefinition* customElementDefinition() const;
 
+    // Fullscreen API
+    void requestFullscreen();
+
     // Mozilla version
     static const unsigned short ALLOW_KEYBOARD_INPUT = 1;
     void webkitRequestFullScreen(unsigned short flags);
 
     // W3C version
     void webkitRequestFullscreen();
 
     bool containsFullScreenElement() const { return hasElementFlag(ContainsFullScreenElement); }
     void setContainsFullScreenElement(bool);
     void setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(bool);
@@ skipping 391 matching lines @@
     static PassRefPtrWillBeRawPtr<T> create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     PassRefPtrWillBeRawPtr<T> T::create(const QualifiedName& tagName, Document& document) \
     { \
         return adoptRefWillBeNoop(new T(tagName, document)); \
     }
 
 } // namespace
 
 #endif