Replace scoped_ptr with unique_ptr in webrtc/common_audio/

webrtc/common_audio/real_fourier.cc

Index: webrtc/common_audio/real_fourier.cc
diff --git a/webrtc/common_audio/real_fourier.cc b/webrtc/common_audio/real_fourier.cc
index 55ec49cba2cfebd702703cd471641a3ab21731be..67f942d560a2a6b60c0a95bc2bb943d4e1681bc2 100644
--- a/webrtc/common_audio/real_fourier.cc
+++ b/webrtc/common_audio/real_fourier.cc
@@ -21,11 +21,11 @@ using std::complex;
 
 const size_t RealFourier::kFftBufferAlignment = 32;
 
-rtc::scoped_ptr<RealFourier> RealFourier::Create(int fft_order) {
+std::unique_ptr<RealFourier> RealFourier::Create(int fft_order) {
 #if defined(RTC_USE_OPENMAX_DL)
-  return rtc::scoped_ptr<RealFourier>(new RealFourierOpenmax(fft_order));
+  return std::unique_ptr<RealFourier>(new RealFourierOpenmax(fft_order));
 #else
-  return rtc::scoped_ptr<RealFourier>(new RealFourierOoura(fft_order));
+  return std::unique_ptr<RealFourier>(new RealFourierOoura(fft_order));
 #endif
 }