Remove the disallowFullscreenForNonMediaElements setting.

Source/core/dom/Fullscreen.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
@@ skipping 47 matching lines @@
     return true;
 }
 
 static bool fullscreenIsSupported(const Document& document)
 {
     // Fullscreen is supported if there is no previously-established user preference,
     // security risk, or platform limitation.
     return !document.settings() || document.settings()->fullscreenSupported();
 }
 
-static bool fullscreenIsSupported(const Document& document, const Element& element)
-{
-    if (!document.settings() || (document.settings()->disallowFullscreenForNonMediaElements() && !isHTMLMediaElement(element)))
-        return false;
-    return fullscreenIsSupported(document);
-}
-
 static bool fullscreenElementReady(const Element& element, Fullscreen::RequestType requestType)
 {
     // A fullscreen element ready check for an element |element| returns true if all of the
     // following are true, and false otherwise:
 
     // |element| is in a document.
     if (!element.inDocument())
         return false;
 
     // |element|'s node document's fullscreen enabled flag is set.
@@ skipping 148 matching lines @@
         //   - the event listener for a trusted click event is being handled.
         if (!UserGestureIndicator::processingUserGesture()) {
             String message = ExceptionMessages::failedToExecute("requestFullScreen",
                 "Element", "API can only be initiated by a user gesture.");
             document()->executionContext()->addConsoleMessage(
                 ConsoleMessage::create(JSMessageSource, WarningMessageLevel, message));
             break;
         }
 
         // Fullscreen is not supported.
-        if (!fullscreenIsSupported(element.document(), element))
+        if (!fullscreenIsSupported(element.document()))
             break;
 
         // 2. Let doc be element's node document. (i.e. "this")
         Document* currentDoc = document();
 
         // 3. Let docs be all doc's ancestor browsing context's documents (if any) and doc.
         Deque<Document*> docs;
 
         do {
             docs.prepend(currentDoc);
@@ skipping 354 matching lines @@
 void Fullscreen::trace(Visitor* visitor)
 {
     visitor->trace(m_fullScreenElement);
     visitor->trace(m_fullScreenElementStack);
     visitor->trace(m_fullScreenRenderer);
     visitor->trace(m_eventQueue);
     DocumentSupplement::trace(visitor);
 }
 
 } // namespace blink