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

Source/core/clipboard/DataObjectItem.h

Index: Source/core/clipboard/DataObjectItem.h
diff --git a/Source/core/clipboard/DataObjectItem.h b/Source/core/clipboard/DataObjectItem.h
index 6896a93086c242a2a759f7cb72bd29a4d33f1aed..a356fcafa1cccf9680418476b042d702a7414f27 100644
--- a/Source/core/clipboard/DataObjectItem.h
+++ b/Source/core/clipboard/DataObjectItem.h
@@ -32,6 +32,7 @@
 #define DataObjectItem_h
 
 #include "core/fileapi/File.h"
+#include "heap/Handle.h"
 #include "platform/SharedBuffer.h"
 #include "platform/weborigin/KURL.h"
 #include "wtf/RefCounted.h"
@@ -42,19 +43,20 @@ namespace WebCore {
 
 class Blob;
 
-class DataObjectItem : public RefCounted<DataObjectItem> {
+class DataObjectItem : public RefCountedWillBeGarbageCollectedFinalized<DataObjectItem> {
+    DECLARE_GC_INFO;
 public:
     enum Kind {
         StringKind,
         FileKind
     };
 
-    static PassRefPtr<DataObjectItem> createFromString(const String& type, const String& data);
-    static PassRefPtr<DataObjectItem> createFromFile(PassRefPtr<File>);
-    static PassRefPtr<DataObjectItem> createFromURL(const String& url, const String& title);
-    static PassRefPtr<DataObjectItem> createFromHTML(const String& html, const KURL& baseURL);
-    static PassRefPtr<DataObjectItem> createFromSharedBuffer(const String& filename, PassRefPtr<SharedBuffer>);
-    static PassRefPtr<DataObjectItem> createFromPasteboard(const String& type, uint64_t sequenceNumber);
+    static PassRefPtrWillBeRawPtr<DataObjectItem> createFromString(const String& type, const String& data);
+    static PassRefPtrWillBeRawPtr<DataObjectItem> createFromFile(PassRefPtr<File>);
+    static PassRefPtrWillBeRawPtr<DataObjectItem> createFromURL(const String& url, const String& title);
+    static PassRefPtrWillBeRawPtr<DataObjectItem> createFromHTML(const String& html, const KURL& baseURL);
+    static PassRefPtrWillBeRawPtr<DataObjectItem> createFromSharedBuffer(const String& filename, PassRefPtr<SharedBuffer>);
+    static PassRefPtrWillBeRawPtr<DataObjectItem> createFromPasteboard(const String& type, uint64_t sequenceNumber);
 
     Kind kind() const { return m_kind; }
     String type() const { return m_type; }
@@ -67,6 +69,8 @@ public:
     KURL baseURL() const { return m_baseURL; }
     bool isFilename() const;
 
+    void trace(Visitor*) { }
+
 private:
     enum DataSource {
         PasteboardSource,