Optimize FindCodecById and ReferencedCodecsMatch

webrtc/api/webrtcsdp.cc

Index: webrtc/api/webrtcsdp.cc
diff --git a/webrtc/api/webrtcsdp.cc b/webrtc/api/webrtcsdp.cc
index b7ef28e38d421c554fb8908dbeccb3ab0ac30138..d78112c1680e86ed1b6b20d9105ca6a48a3dd74e 100644
--- a/webrtc/api/webrtcsdp.cc
+++ b/webrtc/api/webrtcsdp.cc
@@ -2438,10 +2438,12 @@ void AddFeedbackParameters(const cricket::FeedbackParams& feedback_params,
 // with that payload type.
 template <class T>
 T GetCodecWithPayloadType(const std::vector<T>& codecs, int payload_type) {
+  const T* codec = FindCodecById(codecs, payload_type);
+  if (codec)
+    return *codec;
+  // Return empty codec with |payload_type|.
   T ret_val;
-  if (!FindCodecById(codecs, payload_type, &ret_val)) {
-    ret_val.id = payload_type;
-  }
+  ret_val.id = payload_type;
   return ret_val;
 }