Replace scoped_ptr with unique_ptr in webrtc/common_audio/

webrtc/common_audio/channel_buffer.h

Index: webrtc/common_audio/channel_buffer.h
diff --git a/webrtc/common_audio/channel_buffer.h b/webrtc/common_audio/channel_buffer.h
index 9f2fb9635715fa0fc3cf5cf7a198c89b2e9367a1..faecec9194ceb86be1d37104e24e7ad0a6915048 100644
--- a/webrtc/common_audio/channel_buffer.h
+++ b/webrtc/common_audio/channel_buffer.h
@@ -13,9 +13,10 @@
 
 #include <string.h>
 
+#include <memory>
+
 #include "webrtc/base/checks.h"
 #include "webrtc/base/gtest_prod_util.h"
-#include "webrtc/base/scoped_ptr.h"
 #include "webrtc/common_audio/include/audio_util.h"
 
 namespace webrtc {
@@ -125,9 +126,9 @@ class ChannelBuffer {
   }
 
  private:
-  rtc::scoped_ptr<T[]> data_;
-  rtc::scoped_ptr<T* []> channels_;
-  rtc::scoped_ptr<T* []> bands_;
+  std::unique_ptr<T[]> data_;
+  std::unique_ptr<T* []> channels_;
+  std::unique_ptr<T* []> bands_;
   const size_t num_frames_;
   const size_t num_frames_per_band_;
   const size_t num_channels_;