Revert "Remove OwnPtr from Blink."

third_party/WebKit/Source/modules/webaudio/DelayProcessor.h

 /*
  * Copyright (C) 2010, Google 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
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 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 DelayProcessor_h
 #define DelayProcessor_h
 
 #include "modules/webaudio/AudioParam.h"
 #include "platform/audio/AudioDSPKernelProcessor.h"
+#include "wtf/PassOwnPtr.h"
 #include "wtf/RefPtr.h"
-#include <memory>
 
 namespace blink {
 
 class AudioDSPKernel;
 
 class DelayProcessor final : public AudioDSPKernelProcessor {
 public:
     DelayProcessor(float sampleRate, unsigned numberOfChannels, AudioParamHandler& delayTime, double maxDelayTime);
     ~DelayProcessor() override;
 
-    std::unique_ptr<AudioDSPKernel> createKernel() override;
+    PassOwnPtr<AudioDSPKernel> createKernel() override;
 
     AudioParamHandler& delayTime() const { return *m_delayTime; }
     double maxDelayTime() { return m_maxDelayTime; }
 
 private:
     RefPtr<AudioParamHandler> m_delayTime;
     double m_maxDelayTime;
 };
 
 } // namespace blink
 
 #endif // DelayProcessor_h