Oilpan: Prepare to move form control ua shadow elements to Oilpan heap.

Source/core/html/forms/TextFieldInputType.cpp

Index: Source/core/html/forms/TextFieldInputType.cpp
diff --git a/Source/core/html/forms/TextFieldInputType.cpp b/Source/core/html/forms/TextFieldInputType.cpp
index 2981be7d6541ffc18cdd0d5a8f1f3f006b22649c..5bbc66fa83073a96345c481aebfbae2559450e4e 100644
--- a/Source/core/html/forms/TextFieldInputType.cpp
+++ b/Source/core/html/forms/TextFieldInputType.cpp
@@ -98,9 +98,9 @@ private:
     }
 
 public:
-    static PassRefPtr<DataListIndicatorElement> create(Document& document)
+    static PassRefPtrWillBeRawPtr<DataListIndicatorElement> create(Document& document)
     {
-        RefPtr<DataListIndicatorElement> element = adoptRef(new DataListIndicatorElement(document));
+        RefPtrWillBeRawPtr<DataListIndicatorElement> element = adoptRefWillBeRefCountedGarbageCollected(new DataListIndicatorElement(document));
         element->setShadowPseudoId(AtomicString("-webkit-calendar-picker-indicator", AtomicString::ConstructFromLiteral));
         element->setAttribute(idAttr, ShadowElementNames::pickerIndicator());
         return element.release();