Navigation transitions (web to native app): Revert exit transition (Blink side)

Source/core/dom/StyleEngine.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, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 316 matching lines @@
     ASSERT(isStyleElement(*node) || treeScope == m_document);
     markTreeScopeDirty(treeScope);
 }
 
 void StyleEngine::enableExitTransitionStylesheets()
 {
     TreeScopeStyleSheetCollection* collection = ensureStyleSheetCollectionFor(*m_document);
     collection->enableExitTransitionStylesheets();
 }
 
+void StyleEngine::disableExitTransitionStylesheets()
+{
+    TreeScopeStyleSheetCollection* collection = ensureStyleSheetCollectionFor(*m_document);
+    collection->disableExitTransitionStylesheets();
+}
+
 bool StyleEngine::shouldUpdateDocumentStyleSheetCollection(StyleResolverUpdateMode updateMode) const
 {
     return m_documentScopeDirty || updateMode == FullStyleUpdate;
 }
 
 bool StyleEngine::shouldUpdateShadowTreeStyleSheetCollection(StyleResolverUpdateMode updateMode) const
 {
     return !m_dirtyTreeScopes.isEmpty() || updateMode == FullStyleUpdate;
 }
 
@@ skipping 334 matching lines @@
     visitor->trace(m_styleSheetCollectionMap);
     visitor->trace(m_resolver);
     visitor->trace(m_fontSelector);
     visitor->trace(m_textToSheetCache);
     visitor->trace(m_sheetToTextCache);
 #endif
     CSSFontSelectorClient::trace(visitor);
 }
 
 }