Replace scoped_ptr with unique_ptr in webrtc/media/

webrtc/media/engine/webrtcvideoframe.h

Index: webrtc/media/engine/webrtcvideoframe.h
diff --git a/webrtc/media/engine/webrtcvideoframe.h b/webrtc/media/engine/webrtcvideoframe.h
index 404b6941a01e6c80be8635d9638579c45e5dd6cb..ccdcf76f292b6ce7e9526d823ec3821f930452e2 100644
--- a/webrtc/media/engine/webrtcvideoframe.h
+++ b/webrtc/media/engine/webrtcvideoframe.h
@@ -11,6 +11,8 @@
 #ifndef WEBRTC_MEDIA_ENGINE_WEBRTCVIDEOFRAME_H_
 #define WEBRTC_MEDIA_ENGINE_WEBRTCVIDEOFRAME_H_
 
+#include <memory>
+
 #include "webrtc/base/buffer.h"
 #include "webrtc/base/refcount.h"
 #include "webrtc/base/scoped_ref_ptr.h"
@@ -113,7 +115,7 @@ class WebRtcVideoFrame : public VideoFrame {
 
   // This is mutable as the calculation is expensive but once calculated, it
   // remains const.
-  mutable rtc::scoped_ptr<VideoFrame> rotated_frame_;
+  mutable std::unique_ptr<VideoFrame> rotated_frame_;
 };
 
 }  // namespace cricket