Only compare sequence numbers from the same SSRC in ForwardErrorCorrection.

webrtc/modules/rtp_rtcp/source/fec_test_helper.h

Index: webrtc/modules/rtp_rtcp/source/fec_test_helper.h
diff --git a/webrtc/modules/rtp_rtcp/source/fec_test_helper.h b/webrtc/modules/rtp_rtcp/source/fec_test_helper.h
index 50594ec70e200516fb2c8d5ac935139cf91f43b4..1bd8261006ca0c01f931432ce303fa6767b9c9c7 100644
--- a/webrtc/modules/rtp_rtcp/source/fec_test_helper.h
+++ b/webrtc/modules/rtp_rtcp/source/fec_test_helper.h
@@ -49,7 +49,7 @@ class MediaPacketGenerator {
   ForwardErrorCorrection::PacketList ConstructMediaPackets(
       int num_media_packets);
 
-  uint16_t GetFecSeqNum();
+  uint16_t GetNextSeqNum();
 
  private:
   uint32_t min_packet_size_;
@@ -58,7 +58,7 @@ class MediaPacketGenerator {
   Random* random_;
 
   ForwardErrorCorrection::PacketList media_packets_;
-  uint16_t fec_seq_num_;
+  uint16_t next_seq_num_;
 };
 
 // This class generates media packets with a certain structure of the payload.