Adding codecs to the RtpParameters returned by an RtpSender.

webrtc/media/base/codec.cc

Index: webrtc/media/base/codec.cc
diff --git a/webrtc/media/base/codec.cc b/webrtc/media/base/codec.cc
index 287de0cdbf489f1bdb7c5f9f624f75d5b6dd5cb6..770dd66068bde3f275e7192384606a0388d24bcc 100644
--- a/webrtc/media/base/codec.cc
+++ b/webrtc/media/base/codec.cc
@@ -146,6 +146,14 @@ void Codec::IntersectFeedbackParams(const Codec& other) {
   feedback_params.Intersect(other.feedback_params);
 }
 
+webrtc::RtpCodecParameters Codec::ToCodecParameters() const {
+  webrtc::RtpCodecParameters codec_params;
+  codec_params.payload_type = id;
+  codec_params.mime_type = name;
+  codec_params.clock_rate = clockrate;
+  return codec_params;
+}
+
 AudioCodec::AudioCodec(int id,
                        const std::string& name,
                        int clockrate,
@@ -190,6 +198,12 @@ bool AudioCodec::Matches(const AudioCodec& codec) const {
       ((codec.channels < 2 && channels < 2) || channels == codec.channels);
 }
 
+webrtc::RtpCodecParameters AudioCodec::ToCodecParameters() const {
+  webrtc::RtpCodecParameters codec_params = Codec::ToCodecParameters();
+  codec_params.channels = channels;
+  return codec_params;
+}
+
 std::string AudioCodec::ToString() const {
   std::ostringstream os;
   os << "AudioCodec[" << id << ":" << name << ":" << clockrate << ":" << bitrate