Add new codec for FlexFEC.

webrtc/modules/video_coding/codec_database.cc

Index: webrtc/modules/video_coding/codec_database.cc
diff --git a/webrtc/modules/video_coding/codec_database.cc b/webrtc/modules/video_coding/codec_database.cc
index 24a29298e3e3d9381dc7b5e4a622070a241af586..91131e5d9e23bf8f33d4f643ba51965c60b75bd6 100644
--- a/webrtc/modules/video_coding/codec_database.cc
+++ b/webrtc/modules/video_coding/codec_database.cc
@@ -178,6 +178,7 @@ void VCMCodecDataBase::Codec(VideoCodecType codec_type, VideoCodec* settings) {
       return;
     case kVideoCodecRED:
     case kVideoCodecULPFEC:
+    case kVideoCodecFLEXFEC:
     case kVideoCodecGeneric:
     case kVideoCodecUnknown:
       RTC_NOTREACHED();
@@ -350,6 +351,7 @@ bool VCMCodecDataBase::RequiresEncoderReset(const VideoCodec& new_send_codec) {
     case kVideoCodecI420:
     case kVideoCodecRED:
     case kVideoCodecULPFEC:
+    case kVideoCodecFLEXFEC:
       break;
     // Unknown codec type, reset just to be sure.
     case kVideoCodecUnknown: