[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h

Index: webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h
diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h
index a858d3c67f11b5ceec9d503d88ff0103a0ced574..fa23350668b24737503a8f9cdaf5e9a5dcd4f50d 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h
@@ -45,7 +45,7 @@ class IntelligibilityEnhancer {
   // constants in the class (kGainChangeLimit, kAnalyzeRate, kVarianceRate).
   IntelligibilityEnhancer(size_t erb_resolution,
                           int sample_rate_hz,
-                          int channels,
+                          size_t channels,
                           int cv_type,
                           float cv_alpha,
                           size_t cv_win,
@@ -74,9 +74,9 @@ class IntelligibilityEnhancer {
     // All in frequency domain, receives input |in_block|, applies
     // intelligibility enhancement, and writes result to |out_block|.
     void ProcessAudioBlock(const std::complex<float>* const* in_block,
-                           int in_channels,
+                           size_t in_channels,
                            size_t frames,
-                           int out_channels,
+                           size_t out_channels,
                            std::complex<float>* const* out_block) override;
 
    private:
@@ -133,7 +133,7 @@ class IntelligibilityEnhancer {
   const size_t bank_size_;     // Num ERB filters.
   const int sample_rate_hz_;
   const int erb_resolution_;
-  const int channels_;       // Num channels.
+  const size_t channels_;    // Num channels.
   const int analysis_rate_;  // Num blocks before gains recalculated.
   const int variance_rate_;  // Num recalculations before history is cleared.