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

Source/core/testing/Internals.cpp

Index: Source/core/testing/Internals.cpp
diff --git a/Source/core/testing/Internals.cpp b/Source/core/testing/Internals.cpp
index 07492b2185b2ff811fe99dc8d7760e4691208f83..bf25b78b0b18dfe5e106e1055563dc6683da3192 100644
--- a/Source/core/testing/Internals.cpp
+++ b/Source/core/testing/Internals.cpp
@@ -2255,7 +2255,27 @@ void Internals::hideAllTransitionElements()
 
     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)