Replace scoped_ptr with unique_ptr in webrtc/common_audio/

webrtc/common_audio/real_fourier_ooura.h

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_COMMON_AUDIO_REAL_FOURIER_OOURA_H_
 #define WEBRTC_COMMON_AUDIO_REAL_FOURIER_OOURA_H_
 
 #include <complex>
+#include <memory>
 
-#include "webrtc/base/scoped_ptr.h"
 #include "webrtc/common_audio/real_fourier.h"
 
 namespace webrtc {
 
 class RealFourierOoura : public RealFourier {
  public:
   explicit RealFourierOoura(int fft_order);
 
   void Forward(const float* src, std::complex<float>* dest) const override;
   void Inverse(const std::complex<float>* src, float* dest) const override;
 
   int order() const override {
     return order_;
   }
 
  private:
   const int order_;
   const size_t length_;
   const size_t complex_length_;
   // These are work arrays for Ooura. The names are based on the comments in
   // fft4g.c.
-  const rtc::scoped_ptr<size_t[]> work_ip_;
-  const rtc::scoped_ptr<float[]> work_w_;
+  const std::unique_ptr<size_t[]> work_ip_;
+  const std::unique_ptr<float[]> work_w_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_AUDIO_REAL_FOURIER_OOURA_H_