Oilpan: make DataObject and SharedWorker heap Supplementables.

Source/core/clipboard/DataObject.h

Index: Source/core/clipboard/DataObject.h
diff --git a/Source/core/clipboard/DataObject.h b/Source/core/clipboard/DataObject.h
index 247ca0f5bc62444928d015ec407cf0c27f4e9a95..fb49355a20501d5190448fc6e32aacf93b9aeebe 100644
--- a/Source/core/clipboard/DataObject.h
+++ b/Source/core/clipboard/DataObject.h
@@ -50,7 +50,8 @@ class SharedBuffer;
 // A data object for holding data that would be in a clipboard or moved
 // during a drag-n-drop operation. This is the data that WebCore is aware
 // of and is not specific to a platform.
-class DataObject : public RefCountedWillBeGarbageCollectedFinalized<DataObject>, public Supplementable<DataObject> {
+class DataObject : public RefCountedWillBeGarbageCollectedFinalized<DataObject>, public WillBeHeapSupplementable<DataObject> {
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DataObject);
 public:
     static PassRefPtrWillBeRawPtr<DataObject> createFromPasteboard(PasteMode);
     static PassRefPtrWillBeRawPtr<DataObject> create();