Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/modules/notifications/NotificationImageLoader.h

 // Copyright 2016 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.
 
 #ifndef NotificationImageLoader_h
 #define NotificationImageLoader_h
 
 #include "core/loader/ThreadableLoader.h"
 #include "core/loader/ThreadableLoaderClient.h"
 #include "platform/SharedBuffer.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Functional.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
 #include "wtf/RefPtr.h"
-#include <memory>
 
 class SkBitmap;
 
 namespace blink {
 
 class ExecutionContext;
 class KURL;
 class ResourceError;
 
 // Asynchronously downloads an image when given a url, decodes the loaded data,
@@ skipping 23 matching lines @@
 
     DEFINE_INLINE_TRACE() {}
 
 private:
     void runCallbackWithEmptyBitmap();
 
     bool m_stopped;
     double m_startTime;
     RefPtr<SharedBuffer> m_data;
     std::unique_ptr<ImageCallback> m_imageCallback;
-    std::unique_ptr<ThreadableLoader> m_threadableLoader;
+    OwnPtr<ThreadableLoader> m_threadableLoader;
 };
 
 } // namespace blink
 
 #endif // NotificationImageLoader_h