Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/modules/webdatabase/ChangeVersionWrapper.h

 /*
  * Copyright (C) 2007, 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 13 matching lines @@
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #ifndef ChangeVersionWrapper_h
 #define ChangeVersionWrapper_h
 
 #include "modules/webdatabase/SQLTransactionBackend.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
-#include <memory>
 
 namespace blink {
 
 class SQLErrorData;
 
 class ChangeVersionWrapper final : public SQLTransactionWrapper {
 public:
     static ChangeVersionWrapper* create(const String& oldVersion, const String& newVersion) { return new ChangeVersionWrapper(oldVersion, newVersion); }
 
     bool performPreflight(SQLTransactionBackend*) override;
     bool performPostflight(SQLTransactionBackend*) override;
     SQLErrorData* sqlError() const override { return m_sqlError.get(); }
     void handleCommitFailedAfterPostflight(SQLTransactionBackend*) override;
 
 private:
     ChangeVersionWrapper(const String& oldVersion, const String& newVersion);
 
     String m_oldVersion;
     String m_newVersion;
-    std::unique_ptr<SQLErrorData> m_sqlError;
+    OwnPtr<SQLErrorData> m_sqlError;
 };
 
 } // namespace blink
 
 #endif // ChangeVersionWrapper_h