Replace scoped_ptr with unique_ptr in webrtc/common_audio/

webrtc/common_audio/real_fourier.h

Index: webrtc/common_audio/real_fourier.h
diff --git a/webrtc/common_audio/real_fourier.h b/webrtc/common_audio/real_fourier.h
index 0be56a58b0eda10de70445ccb4ac74a46840f694..5e83e37f70ebfbde2f3918c9e17a252dde1529db 100644
--- a/webrtc/common_audio/real_fourier.h
+++ b/webrtc/common_audio/real_fourier.h
@@ -12,8 +12,8 @@
 #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
@@ -25,8 +25,8 @@ namespace webrtc {
 class RealFourier {
  public:
   // Shorthand typenames for the scopers used by the buffer allocation helpers.
-  typedef rtc::scoped_ptr<float[], AlignedFreeDeleter> fft_real_scoper;
-  typedef rtc::scoped_ptr<std::complex<float>[], AlignedFreeDeleter>
+  typedef std::unique_ptr<float[], AlignedFreeDeleter> fft_real_scoper;
+  typedef std::unique_ptr<std::complex<float>[], AlignedFreeDeleter>
       fft_cplx_scoper;
 
   // The alignment required for all input and output buffers, in bytes.
@@ -34,7 +34,7 @@ class RealFourier {
 
   // Construct a wrapper instance for the given input order, which must be
   // between 1 and kMaxFftOrder, inclusively.
-  static rtc::scoped_ptr<RealFourier> Create(int fft_order);
+  static std::unique_ptr<RealFourier> Create(int fft_order);
   virtual ~RealFourier() {};
 
   // Helper to compute the smallest FFT order (a power of 2) which will contain