[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/modules/audio_coding/main/interface/audio_coding_module.h

 /*
  *  Copyright (c) 2012 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 135 matching lines @@
   //
   // Output:
   //   -codec              : a structure where the function returns the
   //                         default parameters of the codec.
   //
   // Return value:
   //   -1 if no codec matches the given parameters.
   //    0 if succeeded.
   //
   static int Codec(const char* payload_name, CodecInst* codec,
-                       int sampling_freq_hz, int channels);
+                   int sampling_freq_hz, size_t channels);
 
   ///////////////////////////////////////////////////////////////////////////
   // int32_t Codec()
   //
   // Returns the list number of the given codec name, sampling frequency, and
   // a given number of channels.
   //
   // Input:
   //   -payload_name        : name of the codec.
   //   -sampling_freq_hz    : sampling frequency of the codec. Note! for RED
   //                          a sampling frequency of -1 is a valid input.
   //   -channels            : number of channels ( 1 - mono, 2 - stereo).
   //
   // Return value:
   //   if the codec is found, the index of the codec in the list,
   //   -1 if the codec is not found.
   //
   static int Codec(const char* payload_name, int sampling_freq_hz,
-                             int channels);
+                   size_t channels);
 
   ///////////////////////////////////////////////////////////////////////////
   // bool IsCodecValid()
   // Checks the validity of the parameters of the given codec.
   //
   // Input:
   //   -codec              : the structure which keeps the parameters of the
   //                         codec.
   //
   // Return value:
@@ skipping 976 matching lines @@
   virtual std::vector<uint16_t> GetNackList(int round_trip_time_ms) const = 0;
 
   // Returns the timing statistics for calls to Get10MsAudio.
   virtual void GetDecodingCallStatistics(
       AudioDecodingCallStats* call_stats) const = 0;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_INTERFACE_AUDIO_CODING_MODULE_H_