Oilpan: move DateTimeChooser to the heap.

third_party/WebKit/Source/core/html/forms/DateTimeChooser.h

Index: third_party/WebKit/Source/core/html/forms/DateTimeChooser.h
diff --git a/third_party/WebKit/Source/core/html/forms/DateTimeChooser.h b/third_party/WebKit/Source/core/html/forms/DateTimeChooser.h
index 7f46aa622085a00a1ff637226d38b56e9f5bfff2..8a14fe3aa9419688d0f3c06a074fcbc51f453ac9 100644
--- a/third_party/WebKit/Source/core/html/forms/DateTimeChooser.h
+++ b/third_party/WebKit/Source/core/html/forms/DateTimeChooser.h
@@ -33,6 +33,7 @@
 
 #include "core/CoreExport.h"
 #include "platform/geometry/IntRect.h"
+#include "platform/heap/Handle.h"
 #include "wtf/Allocator.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
@@ -70,13 +71,15 @@ struct DateTimeChooserParameters {
 };
 
 // For pickers like color pickers and date pickers.
-class CORE_EXPORT DateTimeChooser : public RefCounted<DateTimeChooser> {
+class CORE_EXPORT DateTimeChooser : public RefCountedWillBeGarbageCollectedFinalized<DateTimeChooser> {
 public:
     virtual ~DateTimeChooser();
 
     virtual void endChooser() = 0;
     // Returns a root AXObject in the DateTimeChooser if it's available.
     virtual AXObject* rootAXObject() = 0;
+
+    DEFINE_INLINE_VIRTUAL_TRACE() { }
 };
 
 } // namespace blink