Replace scoped_ptr with unique_ptr in webrtc/common_audio/

webrtc/common_audio/fir_filter_neon.h

Index: webrtc/common_audio/fir_filter_neon.h
diff --git a/webrtc/common_audio/fir_filter_neon.h b/webrtc/common_audio/fir_filter_neon.h
index 3aa6168dd276425bdbba7d15f4f3c31ab8d279bf..5576856b72ca8d11ceb5232d7879f2efde61c2c2 100644
--- a/webrtc/common_audio/fir_filter_neon.h
+++ b/webrtc/common_audio/fir_filter_neon.h
@@ -11,7 +11,8 @@
 #ifndef WEBRTC_COMMON_AUDIO_FIR_FILTER_NEON_H_
 #define WEBRTC_COMMON_AUDIO_FIR_FILTER_NEON_H_
 
-#include "webrtc/base/scoped_ptr.h"
+#include <memory>
+
 #include "webrtc/common_audio/fir_filter.h"
 #include "webrtc/system_wrappers/include/aligned_malloc.h"
 
@@ -28,8 +29,8 @@ class FIRFilterNEON : public FIRFilter {
  private:
   size_t coefficients_length_;
   size_t state_length_;
-  rtc::scoped_ptr<float[], AlignedFreeDeleter> coefficients_;
-  rtc::scoped_ptr<float[], AlignedFreeDeleter> state_;
+  std::unique_ptr<float[], AlignedFreeDeleter> coefficients_;
+  std::unique_ptr<float[], AlignedFreeDeleter> state_;
 };
 
 }  // namespace webrtc