Optimize FindCodecById and ReferencedCodecsMatch

webrtc/pc/mediasession_unittest.cc

Index: webrtc/pc/mediasession_unittest.cc
diff --git a/webrtc/pc/mediasession_unittest.cc b/webrtc/pc/mediasession_unittest.cc
index f23e070797bbdcd39fd9c2e60cdf94188a425648..ca1e4b39394c4af9bb75a2fb03842662cbd32c75 100644
--- a/webrtc/pc/mediasession_unittest.cc
+++ b/webrtc/pc/mediasession_unittest.cc
@@ -192,8 +192,7 @@ GetMediaDirection(const ContentInfo* content) {
 
 static void AddRtxCodec(const VideoCodec& rtx_codec,
                         std::vector<VideoCodec>* codecs) {
-  VideoCodec rtx;
-  ASSERT_FALSE(cricket::FindCodecById(*codecs, rtx_codec.id, &rtx));
+  ASSERT_FALSE(cricket::FindCodecById(*codecs, rtx_codec.id));
   codecs->push_back(rtx_codec);
 }