Replace scoped_ptr with unique_ptr in webrtc/audio/

webrtc/media/engine/fakewebrtccall.cc

Index: webrtc/media/engine/fakewebrtccall.cc
diff --git a/webrtc/media/engine/fakewebrtccall.cc b/webrtc/media/engine/fakewebrtccall.cc
index 59eb230aa0bb3fab6836e7432146f16a151e6f66..af098af8228bb7342ea337547d116cde98e32c9e 100644
--- a/webrtc/media/engine/fakewebrtccall.cc
+++ b/webrtc/media/engine/fakewebrtccall.cc
@@ -76,8 +76,8 @@ webrtc::AudioReceiveStream::Stats FakeAudioReceiveStream::GetStats() const {
 }
 
 void FakeAudioReceiveStream::SetSink(
-    rtc::scoped_ptr<webrtc::AudioSinkInterface> sink) {
-  sink_ = std::move(sink);
+    std::unique_ptr<webrtc::AudioSinkInterface> sink) {
+  sink_ = rtc::UniqueToScoped(std::move(sink));
 }
 
 FakeVideoSendStream::FakeVideoSendStream(