Enable Oilpan for core/clipboard/

Source/core/clipboard/DataObjectTest.cpp

Index: Source/core/clipboard/DataObjectTest.cpp
diff --git a/Source/core/clipboard/DataObjectTest.cpp b/Source/core/clipboard/DataObjectTest.cpp
index 75b606f7de2eedbb0cccbfd103e8cd01e0159b75..54bf87f22380f3e9f88854089a056d1c9e6e7d20 100644
--- a/Source/core/clipboard/DataObjectTest.cpp
+++ b/Source/core/clipboard/DataObjectTest.cpp
@@ -20,7 +20,7 @@ public:
     }
 
 protected:
-    RefPtrWillBePersistent<DataObject> m_dataObject;
+    Persistent<DataObject> m_dataObject;
 };
 
 TEST_F(DataObjectTest, addItemWithFilenameAndNoTitle)
@@ -31,7 +31,7 @@ TEST_F(DataObjectTest, addItemWithFilenameAndNoTitle)
     m_dataObject->addFilename(filePath, String());
     EXPECT_EQ(1U, m_dataObject->length());
 
-    RefPtrWillBeRawPtr<DataObjectItem> item = m_dataObject->item(0);
+    DataObjectItem* item = m_dataObject->item(0);
     EXPECT_EQ(DataObjectItem::FileKind, item->kind());
 
     Blob* blob = item->getAsFile();
@@ -50,7 +50,7 @@ TEST_F(DataObjectTest, addItemWithFilenameAndTitle)
     m_dataObject->addFilename(filePath, "name.cpp");
     EXPECT_EQ(1U, m_dataObject->length());
 
-    RefPtrWillBeRawPtr<DataObjectItem> item = m_dataObject->item(0);
+    DataObjectItem* item = m_dataObject->item(0);
     EXPECT_EQ(DataObjectItem::FileKind, item->kind());
 
     Blob* blob = item->getAsFile();