[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/modules/audio_coding/main/acm2/acm_resampler.cc

Index: webrtc/modules/audio_coding/main/acm2/acm_resampler.cc
diff --git a/webrtc/modules/audio_coding/main/acm2/acm_resampler.cc b/webrtc/modules/audio_coding/main/acm2/acm_resampler.cc
index 2650725331b94e5db5e110836704d11082657ec6..13c8f9d5e8639231e9816b4873b00f24687b1e5a 100644
--- a/webrtc/modules/audio_coding/main/acm2/acm_resampler.cc
+++ b/webrtc/modules/audio_coding/main/acm2/acm_resampler.cc
@@ -28,11 +28,10 @@ ACMResampler::~ACMResampler() {
 int ACMResampler::Resample10Msec(const int16_t* in_audio,
                                  int in_freq_hz,
                                  int out_freq_hz,
-                                 int num_audio_channels,
+                                 size_t num_audio_channels,
                                  size_t out_capacity_samples,
                                  int16_t* out_audio) {
-  size_t in_length = static_cast<size_t>(in_freq_hz * num_audio_channels / 100);
-  int out_length = out_freq_hz * num_audio_channels / 100;
+  size_t in_length = in_freq_hz * num_audio_channels / 100;
   if (in_freq_hz == out_freq_hz) {
     if (out_capacity_samples < in_length) {
       assert(false);
@@ -49,7 +48,7 @@ int ACMResampler::Resample10Msec(const int16_t* in_audio,
     return -1;
   }
 
-  out_length =
+  int out_length =
       resampler_.Resample(in_audio, in_length, out_audio, out_capacity_samples);
   if (out_length == -1) {
     LOG_FERR4(LS_ERROR,
@@ -61,7 +60,7 @@ int ACMResampler::Resample10Msec(const int16_t* in_audio,
     return -1;
   }
 
-  return out_length / num_audio_channels;
+  return static_cast<int>(out_length / num_audio_channels);
 }
 
 }  // namespace acm2