Enable Oilpan for core/clipboard/

Source/web/WebDragDataTest.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 "public/platform/WebDragData.h"
 
 #include "core/clipboard/DataObject.h"
 #include "public/platform/WebVector.h"
 #include <gtest/gtest.h>
 
 namespace blink {
 
 TEST(WebDragDataTest, items)
 {
-    RefPtrWillBeRawPtr<DataObject> dataObject = DataObject::create();
+    DataObject* dataObject = DataObject::create();
 
     // Native file.
     dataObject->add(File::create("/native/path"));
 
     // Blob file.
     const RefPtr<BlobDataHandle> blobDataHandle = BlobDataHandle::create();
     dataObject->add(File::create("name", 0.0, blobDataHandle));
 
     // User visible snapshot file.
     {
@@ skipping 48 matching lines @@
     EXPECT_EQ(WebDragData::Item::StorageTypeFileSystemFile, items[4].storageType);
     EXPECT_EQ("filesystem:http://example.com/isolated/hash/visible-non-native-file", items[4].fileSystemURL);
     EXPECT_EQ(1234, items[4].fileSystemFileSize);
 
     EXPECT_EQ(WebDragData::Item::StorageTypeFileSystemFile, items[5].storageType);
     EXPECT_EQ("filesystem:http://example.com/isolated/hash/not-visible-non-native-file", items[5].fileSystemURL);
     EXPECT_EQ(1234, items[5].fileSystemFileSize);
 }
 
 } // namespace blink