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

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 2237 matching lines @@
     return markup.toString();
 }
 
 void Internals::hideAllTransitionElements()
 {
     Vector<Document::TransitionElementData> elementData;
     frame()->document()->getTransitionElementData(elementData);
 
     Vector<Document::TransitionElementData>::iterator iter = elementData.begin();
     for (; iter != elementData.end(); ++iter)
-        frame()->document()->hideTransitionElements(AtomicString(iter->selector));
+        frame()->document()->onTransitionElementOpacity(AtomicString(iter->selector), 0.0);
+}
+
+void Internals::showAllTransitionElements()
+{
+    Vector<Document::TransitionElementData> elementData;
+    frame()->document()->getTransitionElementData(elementData);
+
+    Vector<Document::TransitionElementData>::iterator iter = elementData.begin();
+    for (; iter != elementData.end(); ++iter)
+        frame()->document()->onTransitionElementOpacity(AtomicString(iter->selector), 1.0);
+}
+
+void Internals::enableExitTransitionStylesheets()
+{
+    frame()->document()->styleEngine()->enableExitTransitionStylesheets();
+}
+
+void Internals::disableExitTransitionStylesheets()
+{
+    frame()->document()->styleEngine()->disableExitTransitionStylesheets();
 }
 
 void Internals::forcePluginPlaceholder(HTMLElement* element, PassRefPtrWillBeRawPtr<DocumentFragment> fragment, ExceptionState& exceptionState)
 {
     if (!element->isPluginElement()) {
         exceptionState.throwDOMException(InvalidNodeTypeError, "The element provided is not a plugin.");
         return;
     }
     toHTMLPlugInElement(element)->setPlaceholder(DocumentFragmentPluginPlaceholder::create(fragment));
 }
 
 void Internals::forcePluginPlaceholder(HTMLElement* element, const Dictionary& options, ExceptionState& exceptionState)
 {
     if (!element->isPluginElement()) {
         exceptionState.throwDOMException(InvalidNodeTypeError, "The element provided is not a plugin.");
         return;
     }
     toHTMLPlugInElement(element)->setPlaceholder(DictionaryPluginPlaceholder::create(element->document(), options));
 }
 
 Iterator* Internals::iterator(ScriptState* scriptState, ExceptionState& exceptionState)
 {
     return new InternalsIterator;
 }
 
 } // namespace blink