Rename class RtpStreamReceiver --> RtpVideoStreamReceiver.

webrtc/modules/rtp_rtcp/source/flexfec_receiver.cc

Index: webrtc/modules/rtp_rtcp/source/flexfec_receiver.cc
diff --git a/webrtc/modules/rtp_rtcp/source/flexfec_receiver.cc b/webrtc/modules/rtp_rtcp/source/flexfec_receiver.cc
index a365fcbec43e938f6b97667e6801c64ca75684c9..4a88cb4f914bf1003639b114ba11117fc2a71f87 100644
--- a/webrtc/modules/rtp_rtcp/source/flexfec_receiver.cc
+++ b/webrtc/modules/rtp_rtcp/source/flexfec_receiver.cc
@@ -112,7 +112,7 @@ bool FlexfecReceiver::AddReceivedPacket(const RtpPacketReceived& packet) {
 // This implementation only returns _recovered_ media packets through the
 // callback, whereas the implementation in UlpfecReceiver returns _all inserted_
 // media packets through the callback. The latter behaviour makes sense
-// for ULPFEC, since the ULPFEC receiver is owned by the RtpStreamReceiver.
+// for ULPFEC, since the ULPFEC receiver is owned by the RtpVideoStreamReceiver.
 // Here, however, the received media pipeline is more decoupled from the
 // FlexFEC decoder, and we therefore do not interfere with the reception
 // of non-recovered media packets.