Style updates to ProducerFec/FecReceiver.

webrtc/modules/rtp_rtcp/include/fec_receiver.h

Index: webrtc/modules/rtp_rtcp/include/fec_receiver.h
diff --git a/webrtc/modules/rtp_rtcp/include/fec_receiver.h b/webrtc/modules/rtp_rtcp/include/fec_receiver.h
index 65e85ad7a5fdfb1a0a04aba5715c7a789eb68de0..453ede406b98ce827af7e9503d2d22a5f955ac63 100644
--- a/webrtc/modules/rtp_rtcp/include/fec_receiver.h
+++ b/webrtc/modules/rtp_rtcp/include/fec_receiver.h
@@ -33,13 +33,18 @@ class FecReceiver {
 
   virtual ~FecReceiver() {}
 
+  // Takes a RED packet, strips the RED header, and adds the resulting
+  // "virtual" RTP packet(s) into the internal buffer.
   virtual int32_t AddReceivedRedPacket(const RTPHeader& rtp_header,
                                        const uint8_t* incoming_rtp_packet,
                                        size_t packet_length,
                                        uint8_t ulpfec_payload_type) = 0;
 
+  // Sends the received packets to the FEC and returns all packets
+  // (both original media and recovered) through the callback.
   virtual int32_t ProcessReceivedFec() = 0;
 
+  // Returns a counter describing the added and recovered packets.
   virtual FecPacketCounter GetPacketCounter() const = 0;
 };
 }  // namespace webrtc