Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/platform/ContentSettingCallbacks.h

 // 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.
 
 #ifndef ContentSettingCallbacks_h
 #define ContentSettingCallbacks_h
 
 #include "platform/PlatformExport.h"
 #include "wtf/Allocator.h"
 #include "wtf/Functional.h"
 #include "wtf/Noncopyable.h"
-#include <memory>
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT ContentSettingCallbacks {
     USING_FAST_MALLOC(ContentSettingCallbacks);
     WTF_MAKE_NONCOPYABLE(ContentSettingCallbacks);
 public:
-    static std::unique_ptr<ContentSettingCallbacks> create(std::unique_ptr<SameThreadClosure> allowed, std::unique_ptr<SameThreadClosure> denied);
+    static PassOwnPtr<ContentSettingCallbacks> create(std::unique_ptr<SameThreadClosure> allowed, std::unique_ptr<SameThreadClosure> denied);
     virtual ~ContentSettingCallbacks() { }
 
     void onAllowed() { (*m_allowed)(); }
     void onDenied() { (*m_denied)(); }
 
 private:
     ContentSettingCallbacks(std::unique_ptr<SameThreadClosure> allowed, std::unique_ptr<SameThreadClosure> denied);
 
     std::unique_ptr<SameThreadClosure> m_allowed;
     std::unique_ptr<SameThreadClosure> m_denied;
 };
 
 } // namespace blink
 
 #endif // ContentSettingCallbacks_h