Revert of Remove webrtc/base/scoped_ptr.h

webrtc/common_audio/real_fourier.h

 /*
  *  Copyright (c) 2014 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_H_
 #define WEBRTC_COMMON_AUDIO_REAL_FOURIER_H_
 
 #include <complex>
 #include <memory>
 
+#include "webrtc/base/scoped_ptr.h"
 #include "webrtc/system_wrappers/include/aligned_malloc.h"
 
 // Uniform interface class for the real DFT and its inverse, for power-of-2
 // input lengths. Also contains helper functions for buffer allocation, taking
 // care of any memory alignment requirements the underlying library might have.
 
 namespace webrtc {
 
 class RealFourier {
  public:
@@ skipping 39 matching lines @@
   // not needed.
   virtual void Inverse(const std::complex<float>* src, float* dest) const = 0;
 
   virtual int order() const = 0;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_COMMON_AUDIO_REAL_FOURIER_H_