[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/modules/audio_processing/test/test_utils.h

Index: webrtc/modules/audio_processing/test/test_utils.h
diff --git a/webrtc/modules/audio_processing/test/test_utils.h b/webrtc/modules/audio_processing/test/test_utils.h
index 7ad462c0957e321cebb5d808eea7d41ee756f069..11ef236764101d6204e97a774271cd4130b78e60 100644
--- a/webrtc/modules/audio_processing/test/test_utils.h
+++ b/webrtc/modules/audio_processing/test/test_utils.h
@@ -49,8 +49,8 @@ void WriteIntData(const int16_t* data,
                   RawFile* raw_file);
 
 void WriteFloatData(const float* const* data,
-                    int samples_per_channel,
-                    int num_channels,
+                    size_t samples_per_channel,
+                    size_t num_channels,
                     WavWriter* wav_file,
                     RawFile* raw_file);
 
@@ -64,7 +64,7 @@ void SetFrameSampleRate(AudioFrame* frame,
 
 template <typename T>
 void SetContainerFormat(int sample_rate_hz,
-                        int num_channels,
+                        size_t num_channels,
                         AudioFrame* frame,
                         rtc::scoped_ptr<ChannelBuffer<T> >* cb) {
   SetFrameSampleRate(frame, sample_rate_hz);
@@ -72,14 +72,14 @@ void SetContainerFormat(int sample_rate_hz,
   cb->reset(new ChannelBuffer<T>(frame->samples_per_channel_, num_channels));
 }
 
-AudioProcessing::ChannelLayout LayoutFromChannels(int num_channels);
+AudioProcessing::ChannelLayout LayoutFromChannels(size_t num_channels);
 
 template <typename T>
-float ComputeSNR(const T* ref, const T* test, int length, float* variance) {
+float ComputeSNR(const T* ref, const T* test, size_t length, float* variance) {
   float mse = 0;
   float mean = 0;
   *variance = 0;
-  for (int i = 0; i < length; ++i) {
+  for (size_t i = 0; i < length; ++i) {
     T error = ref[i] - test[i];
     mse += error * error;
     *variance += ref[i] * ref[i];