Convert channel counts to size_t.

webrtc/modules/audio_coding/acm2/acm_receive_test_oldapi.cc

 /*
  *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 37 matching lines @@
 // iSAC wideband = 103
 // iSAC super-wideband = 104
 // AVT/DTMF = 106
 // RED = 117
 // PCM16b 8 kHz = 93
 // PCM16b 16 kHz = 94
 // PCM16b 32 kHz = 95
 // G.722 = 94
 bool RemapPltypeAndUseThisCodec(const char* plname,
                                 int plfreq,
-                                int channels,
+                                size_t channels,
                                 int* pltype) {
   if (channels != 1)
     return false;  // Don't use non-mono codecs.
 
   // Re-map pltypes to those used in the NetEq test files.
   if (STR_CASE_CMP(plname, "PCMU") == 0 && plfreq == 8000) {
     *pltype = 0;
   } else if (STR_CASE_CMP(plname, "PCMA") == 0 && plfreq == 8000) {
     *pltype = 8;
   } else if (STR_CASE_CMP(plname, "CN") == 0 && plfreq == 8000) {
@@ skipping 144 matching lines @@
   if (clock_.TimeInMilliseconds() >= last_toggle_time_ms_ + toggle_period_ms_) {
     output_freq_hz_ = (output_freq_hz_ == output_freq_hz_1_)
                           ? output_freq_hz_2_
                           : output_freq_hz_1_;
     last_toggle_time_ms_ = clock_.TimeInMilliseconds();
   }
 }
 
 }  // namespace test
 }  // namespace webrtc