Enable Oilpan for core/clipboard/

Source/core/clipboard/DataObjectTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/clipboard/DataObject.h"
 
 #include "core/clipboard/DataObjectItem.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebUnitTestSupport.h"
 #include <gtest/gtest.h>
 
 namespace blink {
 
 class DataObjectTest : public ::testing::Test {
 public:
     DataObjectTest()
         : m_dataObject(DataObject::create())
     {
     }
 
 protected:
-    RefPtrWillBePersistent<DataObject> m_dataObject;
+    Persistent<DataObject> m_dataObject;
 };
 
 TEST_F(DataObjectTest, addItemWithFilenameAndNoTitle)
 {
     String filePath = Platform::current()->unitTestSupport()->webKitRootDir();
     filePath.append("/Source/core/clipboard/DataObjectTest.cpp");
 
     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();
     ASSERT_TRUE(blob->isFile());
     File* file = toFile(blob);
     EXPECT_TRUE(file->hasBackingFile());
     EXPECT_EQ(File::IsUserVisible, file->userVisibility());
     EXPECT_EQ(filePath, file->path());
 }
 
 TEST_F(DataObjectTest, addItemWithFilenameAndTitle)
 {
     String filePath = Platform::current()->unitTestSupport()->webKitRootDir();
     filePath.append("/Source/core/clipboard/DataObjectTest.cpp");
 
     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();
     ASSERT_TRUE(blob->isFile());
     File* file = toFile(blob);
     EXPECT_TRUE(file->hasBackingFile());
     EXPECT_EQ(File::IsUserVisible, file->userVisibility());
     EXPECT_EQ(filePath, file->path());
     EXPECT_EQ("name.cpp", file->name());
 }
 
 } // namespace blink