Replaced RefPtr::release with std::move in Source/core.

third_party/WebKit/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)
@@ skipping 750 matching lines @@
   // allowfullscreen and fullscreen is supported, and false otherwise.
   return allowedToUseFullscreen(document.frame()) &&
          fullscreenIsSupported(document);
 }
 
 void Fullscreen::setFullScreenLayoutObject(LayoutFullScreen* layoutObject) {
   if (layoutObject == m_fullScreenLayoutObject)
     return;
 
   if (layoutObject && m_savedPlaceholderComputedStyle) {
-    layoutObject->createPlaceholder(m_savedPlaceholderComputedStyle.release(),
+    layoutObject->createPlaceholder(std::move(m_savedPlaceholderComputedStyle),
                                     m_savedPlaceholderFrameRect);
   } else if (layoutObject && m_fullScreenLayoutObject &&
              m_fullScreenLayoutObject->placeholder()) {
     LayoutBlockFlow* placeholder = m_fullScreenLayoutObject->placeholder();
     layoutObject->createPlaceholder(
         ComputedStyle::clone(placeholder->styleRef()),
         placeholder->frameRect());
   }
 
   if (m_fullScreenLayoutObject)
@@ skipping 130 matching lines @@
 }
 
 DEFINE_TRACE(Fullscreen) {
   visitor->trace(m_pendingRequests);
   visitor->trace(m_fullscreenElementStack);
   Supplement<Document>::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink