Replace scoped_ptr with unique_ptr in webrtc/modules/audio_device/

webrtc/modules/audio_device/mac/audio_device_mac.h

Index: webrtc/modules/audio_device/mac/audio_device_mac.h
diff --git a/webrtc/modules/audio_device/mac/audio_device_mac.h b/webrtc/modules/audio_device/mac/audio_device_mac.h
index ca3a51997daf3b1fabeb956524a052e2928bb09c..102c67e97cb0fdd60738d6ba321cb0b6946e0b96 100644
--- a/webrtc/modules/audio_device/mac/audio_device_mac.h
+++ b/webrtc/modules/audio_device/mac/audio_device_mac.h
@@ -11,7 +11,8 @@
 #ifndef WEBRTC_AUDIO_DEVICE_AUDIO_DEVICE_MAC_H
 #define WEBRTC_AUDIO_DEVICE_AUDIO_DEVICE_MAC_H
 
-#include "webrtc/base/scoped_ptr.h"
+#include <memory>
+
 #include "webrtc/base/thread_annotations.h"
 #include "webrtc/modules/audio_device/audio_device_generic.h"
 #include "webrtc/modules/audio_device/mac/audio_mixer_manager_mac.h"
@@ -290,10 +291,10 @@ class AudioDeviceMac : public AudioDeviceGeneric {
   // TODO(pbos): Replace with direct members, just start/stop, no need to
   // recreate the thread.
   // Only valid/running between calls to StartRecording and StopRecording.
-  rtc::scoped_ptr<rtc::PlatformThread> capture_worker_thread_;
+  std::unique_ptr<rtc::PlatformThread> capture_worker_thread_;
 
   // Only valid/running between calls to StartPlayout and StopPlayout.
-  rtc::scoped_ptr<rtc::PlatformThread> render_worker_thread_;
+  std::unique_ptr<rtc::PlatformThread> render_worker_thread_;
 
   int32_t _id;