Oilpan: Move core/clipboard/ to oilpan's heap

Source/core/clipboard/DataTransferItem.h

Index: Source/core/clipboard/DataTransferItem.h
diff --git a/Source/core/clipboard/DataTransferItem.h b/Source/core/clipboard/DataTransferItem.h
index 74dd384e67b896ed7b2ee278a1bf89b37871d31b..ba5ac8b33ea736ab4363d6de718c2a1d6716751e 100644
--- a/Source/core/clipboard/DataTransferItem.h
+++ b/Source/core/clipboard/DataTransferItem.h
@@ -32,6 +32,7 @@
 #define DataTransferItem_h
 
 #include "bindings/v8/ScriptWrappable.h"
+#include "heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
@@ -45,9 +46,10 @@ class File;
 class StringCallback;
 class ExecutionContext;
 
-class DataTransferItem : public RefCounted<DataTransferItem>, public ScriptWrappable {
+class DataTransferItem : public RefCountedWillBeGarbageCollectedFinalized<DataTransferItem>, public ScriptWrappable {
+    DECLARE_GC_INFO;
 public:
-    static PassRefPtr<DataTransferItem> create(PassRefPtr<Clipboard>, PassRefPtr<DataObjectItem>);
+    static PassRefPtrWillBeRawPtr<DataTransferItem> create(PassRefPtrWillBeRawPtr<Clipboard>, PassRefPtrWillBeRawPtr<DataObjectItem>);
     ~DataTransferItem();
 
     String kind() const;
@@ -59,11 +61,13 @@ public:
     Clipboard* clipboard() { return m_clipboard.get(); }
     DataObjectItem* dataObjectItem() { return m_item.get(); }
 
+    void trace(Visitor*);
+
 private:
-    DataTransferItem(PassRefPtr<Clipboard>, PassRefPtr<DataObjectItem>);
+    DataTransferItem(PassRefPtrWillBeRawPtr<Clipboard>, PassRefPtrWillBeRawPtr<DataObjectItem>);
 
-    RefPtr<Clipboard> m_clipboard;
-    RefPtr<DataObjectItem> m_item;
+    RefPtrWillBeMember<Clipboard> m_clipboard;
+    RefPtrWillBeMember<DataObjectItem> m_item;
 };
 
 } // namespace WebCore