Reland "Sync requestFullscreen() and exitFullscreen() algorithms with the spec"

third_party/WebKit/Source/core/page/ChromeClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple, Inc. All rights
  * reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 248 matching lines @@
   // one. Otherwise it sets it for the WebViewImpl.
   virtual void AttachRootLayer(WebLayer*, LocalFrame* local_root) = 0;
 
   virtual void AttachCompositorAnimationTimeline(CompositorAnimationTimeline*,
                                                  LocalFrame* local_root) {}
   virtual void DetachCompositorAnimationTimeline(CompositorAnimationTimeline*,
                                                  LocalFrame* local_root) {}
 
   virtual void EnterFullscreen(LocalFrame&) {}
   virtual void ExitFullscreen(LocalFrame&) {}
-  virtual void FullscreenElementChanged(Element*, Element*) {}
+  virtual void FullscreenElementChanged(Element* from_element,
+                                        Element* to_element) {}
 
   virtual void ClearCompositedSelection(LocalFrame*) {}
   virtual void UpdateCompositedSelection(LocalFrame*,
                                          const CompositedSelection&) {}
 
   virtual void SetEventListenerProperties(LocalFrame*,
                                           WebEventListenerClass,
                                           WebEventListenerProperties) = 0;
   virtual WebEventListenerProperties EventListenerProperties(
       LocalFrame*,
@@ skipping 118 matching lines @@
   WeakMember<Node> last_mouse_over_node_;
   LayoutPoint last_tool_tip_point_;
   String last_tool_tip_text_;
 
   FRIEND_TEST_ALL_PREFIXES(ChromeClientTest, SetToolTipFlood);
 };
 
 }  // namespace blink
 
 #endif  // ChromeClient_h