Make Fullscreen::requestFullscreen and exitFullscreen static

third_party/WebKit/Source/core/dom/Fullscreen.h

 /*
  * 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 51 matching lines @@
         // Element.requestFullscreen()
         UnprefixedRequest,
         // Element.webkitRequestFullscreen()/webkitRequestFullScreen() and
         // HTMLVideoElement.webkitEnterFullscreen()/webkitEnterFullScreen()
         PrefixedRequest,
     };
 
     // |forCrossProcessDescendant| is used in OOPIF scenarios and is set to
     // true when fullscreen is requested for an out-of-process descendant
     // element.
-    void requestFullscreen(Element&, RequestType, bool forCrossProcessDescendant = false);
+    static void requestFullscreen(Element&, RequestType, bool forCrossProcessDescendant = false);
 
     static void fullyExitFullscreen(Document&);
-    void exitFullscreen();
+    static void exitFullscreen(Document&);
 
     static bool fullscreenEnabled(Document&);
     // TODO(foolip): The fullscreen element stack is modified synchronously in
     // requestFullscreen(), which is not per spec and means that
     // |fullscreenElement()| is not always the same as
     // |currentFullScreenElement()|, see https://crbug.com/402421.
     Element* fullscreenElement() const { return !m_fullscreenElementStack.isEmpty() ? m_fullscreenElementStack.last().first.get() : nullptr; }
 
     void didEnterFullscreenForElement(Element*);
     void didExitFullscreen();
@@ skipping 66 matching lines @@
 inline bool Fullscreen::isCurrentFullScreenElement(const Element& element)
 {
     if (Fullscreen* found = fromIfExists(element.document()))
         return found->currentFullScreenElement() == &element;
     return false;
 }
 
 } // namespace blink
 
 #endif // Fullscreen_h