Add a requestFullscreen variant with a default (prefixed) type

third_party/WebKit/Source/web/WebPluginContainerImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2014 Opera Software ASA. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 290 matching lines @@
   if (layer)
     GraphicsLayer::registerContentsLayer(layer);
 
   m_webLayer = layer;
 
   if (m_element)
     m_element->setNeedsCompositingUpdate();
 }
 
 void WebPluginContainerImpl::requestFullscreen() {
-  Fullscreen::requestFullscreen(*m_element, Fullscreen::PrefixedRequest);
+  Fullscreen::requestFullscreen(*m_element);
 }
 
 bool WebPluginContainerImpl::isFullscreenElement() const {
   return Fullscreen::isCurrentFullScreenElement(*m_element);
 }
 
 void WebPluginContainerImpl::cancelFullscreen() {
   Fullscreen::fullyExitFullscreen(m_element->document());
 }
 
@@ skipping 639 matching lines @@
     // frame view.
     computeClipRectsForPlugin(m_element, windowRect, clipRect, unobscuredRect);
   }
   getPluginOcclusions(m_element, this->parent(), frameRect(), cutOutRects);
   // Convert to the plugin position.
   for (size_t i = 0; i < cutOutRects.size(); i++)
     cutOutRects[i].move(-frameRect().x(), -frameRect().y());
 }
 
 }  // namespace blink