Revert of Replace the remaining scoped_ptr with unique_ptr in webrtc/modules/

webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.cc

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.cc b/webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.cc
index 5cdaa3aaa470989ed3a030d91211a0245c22d591..4ad49561b80cc61abbba5265f1e6fbcc0df5a384 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.cc
@@ -651,10 +651,10 @@
 //    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 
 // De-serialize packet.
-std::unique_ptr<TransportFeedback> TransportFeedback::ParseFrom(
+rtc::scoped_ptr<TransportFeedback> TransportFeedback::ParseFrom(
     const uint8_t* buffer,
     size_t length) {
-  std::unique_ptr<TransportFeedback> packet(new TransportFeedback());
+  rtc::scoped_ptr<TransportFeedback> packet(new TransportFeedback());
 
   if (length < kMinSizeBytes) {
     LOG(LS_WARNING) << "Buffer too small (" << length