[NOT FOR REVIEW] Convert channel counts to size_t.

talk/media/base/codec.cc

 /*
  * libjingle
  * Copyright 2004 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 149 matching lines @@
 }
 
 void Codec::IntersectFeedbackParams(const Codec& other) {
   feedback_params.Intersect(other.feedback_params);
 }
 
 AudioCodec::AudioCodec(int pt,
                        const std::string& nm,
                        int cr,
                        int br,
-                       int cs,
+                       size_t cs,
                        int pr)
     : Codec(pt, nm, cr, pr), bitrate(br), channels(cs) {
 }
 
 AudioCodec::AudioCodec() : Codec(), bitrate(0), channels(0) {
 }
 
 AudioCodec::AudioCodec(const AudioCodec& c) = default;
 
 AudioCodec& AudioCodec::operator=(const AudioCodec& c) {
@@ skipping 151 matching lines @@
 bool HasRemb(const VideoCodec& codec) {
   return codec.HasFeedbackParam(
       FeedbackParam(kRtcpFbParamRemb, kParamValueEmpty));
 }
 
 bool CodecNamesEq(const std::string& name1, const std::string& name2) {
   return _stricmp(name1.c_str(), name2.c_str()) == 0;
 }
 
 }  // namespace cricket