Convert channel counts to size_t.

webrtc/common_audio/resampler/include/push_resampler.h

Index: webrtc/common_audio/resampler/include/push_resampler.h
diff --git a/webrtc/common_audio/resampler/include/push_resampler.h b/webrtc/common_audio/resampler/include/push_resampler.h
index b5c0003615de1e5b6f7e7d8805c09c8896425577..eeda79049707e00600a0ad1d9361834e2f6f738d 100644
--- a/webrtc/common_audio/resampler/include/push_resampler.h
+++ b/webrtc/common_audio/resampler/include/push_resampler.h
@@ -29,7 +29,7 @@ class PushResampler {
   // Must be called whenever the parameters change. Free to be called at any
   // time as it is a no-op if parameters have not changed since the last call.
   int InitializeIfNeeded(int src_sample_rate_hz, int dst_sample_rate_hz,
-                         int num_channels);
+                         size_t num_channels);
 
   // Returns the total number of samples provided in destination (e.g. 32 kHz,
   // 2 channel audio gives 640 samples).
@@ -40,7 +40,7 @@ class PushResampler {
   rtc::scoped_ptr<PushSincResampler> sinc_resampler_right_;
   int src_sample_rate_hz_;
   int dst_sample_rate_hz_;
-  int num_channels_;
+  size_t num_channels_;
   rtc::scoped_ptr<T[]> src_left_;
   rtc::scoped_ptr<T[]> src_right_;
   rtc::scoped_ptr<T[]> dst_left_;