Revert of Sync requestFullscreen() and exitFullscreen() algorithms with the spec

third_party/WebKit/Source/core/dom/LayoutTreeBuilder.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 125 matching lines @@
   // using inLayoutFlowThread() in the styleWillChange and styleDidChange will
   // fail.
   newLayoutObject->setIsInsideFlowThread(
       parentLayoutObject->isInsideFlowThread());
 
   LayoutObject* nextLayoutObject = this->nextLayoutObject();
   m_node->setLayoutObject(newLayoutObject);
   newLayoutObject->setStyle(
       &style);  // setStyle() can depend on layoutObject() already being set.
 
-  if (Fullscreen::isFullscreenElement(*m_node)) {
+  if (Fullscreen::isCurrentFullScreenElement(*m_node)) {
     newLayoutObject = LayoutFullScreen::wrapLayoutObject(
         newLayoutObject, parentLayoutObject, &m_node->document());
     if (!newLayoutObject)
       return;
   }
 
   // Note: Adding newLayoutObject instead of layoutObject(). layoutObject() may
   // be a child of newLayoutObject.
   parentLayoutObject->addChild(newLayoutObject, nextLayoutObject);
 }
@@ skipping 17 matching lines @@
       m_layoutObjectParent->isInsideFlowThread());
 
   LayoutObject* nextLayoutObject = this->nextLayoutObject();
   m_node->setLayoutObject(newLayoutObject);
   // Parent takes care of the animations, no need to call setAnimatableStyle.
   newLayoutObject->setStyle(&style);
   m_layoutObjectParent->addChild(newLayoutObject, nextLayoutObject);
 }
 
 }  // namespace blink