Add new codec for FlexFEC.

webrtc/media/engine/webrtcvideoengine2.cc

Index: webrtc/media/engine/webrtcvideoengine2.cc
diff --git a/webrtc/media/engine/webrtcvideoengine2.cc b/webrtc/media/engine/webrtcvideoengine2.cc
index e37bf94a651cc517676c484861ee063ebc1b1aca..e6d2881e56198d1af707db2388b8bd9e18d4a23a 100644
--- a/webrtc/media/engine/webrtcvideoengine2.cc
+++ b/webrtc/media/engine/webrtcvideoengine2.cc
@@ -2513,6 +2513,11 @@ WebRtcVideoChannel2::MapCodecs(const std::vector<VideoCodec>& codecs) {
         continue;
       }
 
+      case VideoCodec::CODEC_FLEXFEC: {
+        // TODO(brandtr): To be implemented.
+        continue;
+      }
+
       case VideoCodec::CODEC_RTX: {
         int associated_payload_type;
         if (!in_codec.GetParam(kCodecParamAssociatedPayloadType,