[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/modules/audio_processing/vad/voice_activity_detector.cc

 /*
  *  Copyright (c) 2015 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.
  */
 
 #include "webrtc/modules/audio_processing/vad/voice_activity_detector.h"
 
 #include <algorithm>
 
 #include "webrtc/base/checks.h"
 
 namespace webrtc {
 namespace {
 
 const size_t kMaxLength = 320;
-const int kNumChannels = 1;
+const size_t kNumChannels = 1;
 
 const double kDefaultVoiceValue = 1.0;
 const double kNeutralProbability = 0.5;
 const double kLowProbability = 0.01;
 
 }  // namespace
 
 VoiceActivityDetector::VoiceActivityDetector()
     : last_voice_probability_(kDefaultVoiceValue),
       standalone_vad_(StandaloneVad::Create()) {
@@ skipping 44 matching lines @@
           0);
       CHECK_GE(pitch_based_vad_.VoicingProbability(
                    features_, &chunkwise_voice_probabilities_[0]),
                0);
     }
     last_voice_probability_ = chunkwise_voice_probabilities_.back();
   }
 }
 
 }  // namespace webrtc