Implement the unprefixed the Fullscreen API

Source/core/dom/Element.cpp

 /*
  * 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)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 2669 matching lines @@
 double Element::getFloatingPointAttribute(const QualifiedName& attributeName, double fallbackValue) const
 {
     return parseToDoubleForNumberType(getAttribute(attributeName), fallbackValue);
 }
 
 void Element::setFloatingPointAttribute(const QualifiedName& attributeName, double value)
 {
     setAttribute(attributeName, AtomicString::number(value));
 }
 
+void Element::requestFullscreen()
+{
+    FullscreenElementStack::from(document()).requestFullScreenForElement(*this, FullscreenElementStack::UnprefixedRequest);
+}
+
 void Element::webkitRequestFullscreen()
 {
     FullscreenElementStack::from(document()).requestFullScreenForElement(*this, FullscreenElementStack::PrefixedRequest);
 }
 
 void Element::webkitRequestFullScreen(unsigned short flags)
 {
     FullscreenElementStack::RequestType requestType;
     if (flags & ALLOW_KEYBOARD_INPUT)
         requestType = FullscreenElementStack::PrefixedMozillaAllowKeyboardInputRequest;
@@ skipping 653 matching lines @@
 
 void Element::trace(Visitor* visitor)
 {
     if (hasRareData())
         visitor->trace(elementRareData());
     visitor->trace(m_elementData);
     ContainerNode::trace(visitor);
 }
 
 } // namespace WebCore