Oilpan: Use transition types for HTMLDivElement.

Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp

Index: Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp
diff --git a/Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp b/Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp
index a678dbebd5ba26c6b4f5f2a0bb4e7bc1b463a65b..045527016bac69b2e95d042b35e4035ad601f062 100644
--- a/Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp
+++ b/Source/core/html/forms/BaseChooserOnlyDateAndTimeInputType.cpp
@@ -61,7 +61,7 @@ void BaseChooserOnlyDateAndTimeInputType::createShadowSubtree()
 {
     DEFINE_STATIC_LOCAL(AtomicString, valueContainerPseudo, ("-webkit-date-and-time-value", AtomicString::ConstructFromLiteral));
 
-    RefPtr<HTMLDivElement> valueContainer = HTMLDivElement::create(element().document());
+    RefPtrWillBeRawPtr<HTMLDivElement> valueContainer = HTMLDivElement::create(element().document());
     valueContainer->setShadowPseudoId(valueContainerPseudo);
     element().userAgentShadowRoot()->appendChild(valueContainer.get());
     updateView();