Migrate WTF::Vector::append() to ::push_back() [part 4 of N]

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 802 matching lines @@
 
 void Fullscreen::popFullscreenElementStack() {
   if (m_fullscreenElementStack.isEmpty())
     return;
 
   m_fullscreenElementStack.pop_back();
 }
 
 void Fullscreen::pushFullscreenElementStack(Element& element,
                                             RequestType requestType) {
-  m_fullscreenElementStack.append(std::make_pair(&element, requestType));
+  m_fullscreenElementStack.push_back(std::make_pair(&element, requestType));
 }
 
 DEFINE_TRACE(Fullscreen) {
   visitor->trace(m_pendingFullscreenElement);
   visitor->trace(m_fullscreenElementStack);
   visitor->trace(m_currentFullScreenElement);
   visitor->trace(m_eventQueue);
   Supplement<Document>::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink