Convert channel counts to size_t.

talk/media/webrtc/webrtcvoiceengine.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 392 matching lines @@
       }
     }
     return false;
   }
 
  private:
   static const int kMaxNumPacketSize = 6;
   struct CodecPref {
     const char* name;
     int clockrate;
-    int channels;
+    size_t channels;
     int payload_type;
     bool is_multi_rate;
     int packet_sizes_ms[kMaxNumPacketSize];
   };
   // Note: keep the supported packet sizes in ascending order.
   static const CodecPref kCodecPrefs[12];
 
   static int SelectPacketSize(const CodecPref& codec_pref, int ptime_ms) {
     int selected_packet_size_ms = codec_pref.packet_sizes_ms[0];
     for (int packet_size_ms : codec_pref.packet_sizes_ms) {
@@ skipping 724 matching lines @@
       renderer_->SetSink(nullptr);
       renderer_ = nullptr;
     }
   }
 
   // AudioRenderer::Sink implementation.
   // This method is called on the audio thread.
   void OnData(const void* audio_data,
               int bits_per_sample,
               int sample_rate,
-              int number_of_channels,
+              size_t number_of_channels,
               size_t number_of_frames) override {
     RTC_DCHECK(!worker_thread_checker_.CalledOnValidThread());
     RTC_DCHECK(audio_capture_thread_checker_.CalledOnValidThread());
     RTC_DCHECK(voe_audio_transport_);
     voe_audio_transport_->OnData(config_.voe_channel_id,
                                  audio_data,
                                  bits_per_sample,
                                  sample_rate,
                                  number_of_channels,
                                  number_of_frames);
@@ skipping 1331 matching lines @@
     }
   } else {
     LOG(LS_INFO) << "Stopping playout for channel #" << channel;
     engine()->voe()->base()->StopPlayout(channel);
   }
   return true;
 }
 }  // namespace cricket
 
 #endif  // HAVE_WEBRTC_VOICE