Replace scoped_ptr with unique_ptr in webrtc/api/

webrtc/api/videocapturertracksource.h

Index: webrtc/api/videocapturertracksource.h
diff --git a/webrtc/api/videocapturertracksource.h b/webrtc/api/videocapturertracksource.h
index 2eb7b507418799e17accd6049ca76bf824cf19f0..fa4ef0709bba1d0ed2c772b718999ab6a8565c6e 100644
--- a/webrtc/api/videocapturertracksource.h
+++ b/webrtc/api/videocapturertracksource.h
@@ -11,6 +11,8 @@
 #ifndef WEBRTC_API_VIDEOCAPTURERTRACKSOURCE_H_
 #define WEBRTC_API_VIDEOCAPTURERTRACKSOURCE_H_
 
+#include <memory>
+
 #include "webrtc/api/mediastreaminterface.h"
 #include "webrtc/api/videotracksource.h"
 #include "webrtc/base/asyncinvoker.h"
@@ -73,7 +75,7 @@ class VideoCapturerTrackSource : public VideoTrackSource,
   rtc::Thread* signaling_thread_;
   rtc::Thread* worker_thread_;
   rtc::AsyncInvoker invoker_;
-  rtc::scoped_ptr<cricket::VideoCapturer> video_capturer_;
+  std::unique_ptr<cricket::VideoCapturer> video_capturer_;
   bool started_;
   cricket::VideoFormat format_;
   rtc::Optional<bool> needs_denoising_;