Remove the allowfullscreen exemption for the video-specific fullscreen API (reland)

Source/core/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 3124 matching lines @@
 
 bool HTMLMediaElement::isFullscreen() const
 {
     return Fullscreen::isActiveFullScreenElement(*this);
 }
 
 void HTMLMediaElement::enterFullscreen()
 {
     WTF_LOG(Media, "HTMLMediaElement::enterFullscreen(%p)", this);
 
-    Fullscreen::from(document()).requestFullscreen(*this, Fullscreen::PrefixedVideoRequest);
+    Fullscreen::from(document()).requestFullscreen(*this, Fullscreen::PrefixedRequest);
 }
 
 void HTMLMediaElement::exitFullscreen()
 {
     WTF_LOG(Media, "HTMLMediaElement::exitFullscreen(%p)", this);
 
     Fullscreen::from(document()).exitFullscreen();
 }
 
 void HTMLMediaElement::didBecomeFullscreenElement()
@@ skipping 534 matching lines @@
 
 #if ENABLE(WEB_AUDIO)
 void HTMLMediaElement::clearWeakMembers(Visitor* visitor)
 {
     if (!Heap::isHeapObjectAlive(m_audioSourceNode) && audioSourceProvider())
         audioSourceProvider()->setClient(nullptr);
 }
 #endif
 
 }