Replace the remaining scoped_ptr with unique_ptr in webrtc/modules/

webrtc/modules/rtp_rtcp/source/rtp_sender.h

Index: webrtc/modules/rtp_rtcp/source/rtp_sender.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_sender.h b/webrtc/modules/rtp_rtcp/source/rtp_sender.h
index 99465c67f30c3772bd60b03623470d38380880f9..f9d5df68022516d7f4a7b589213d037d80b01c31 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_sender.h
+++ b/webrtc/modules/rtp_rtcp/source/rtp_sender.h
@@ -13,6 +13,7 @@
 
 #include <list>
 #include <map>
+#include <memory>
 #include <utility>
 #include <vector>
 
@@ -423,8 +424,8 @@ class RTPSender : public RTPSenderInterface {
   Bitrate total_bitrate_sent_;
 
   const bool audio_configured_;
-  const rtc::scoped_ptr<RTPSenderAudio> audio_;
-  const rtc::scoped_ptr<RTPSenderVideo> video_;
+  const std::unique_ptr<RTPSenderAudio> audio_;
+  const std::unique_ptr<RTPSenderVideo> video_;
 
   RtpPacketSender* const paced_sender_;
   TransportSequenceNumberAllocator* const transport_sequence_number_allocator_;