Update a ton of audio code to use size_t more correctly and in general reduce

webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h

Index: webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h
diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h b/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h
index fa0e974ad976b0d87221c5bea13dd02a8de5da66..4ac11671474dcde823379be25990532684a499ea 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h
@@ -36,10 +36,12 @@ std::complex<float> zerofudge(std::complex<float> c);
 // mean |mean| with added |data|.
 std::complex<float> NewMean(std::complex<float> mean,
                             std::complex<float> data,
-                            int count);
+                            size_t count);
 
 // Updates |mean| with added |data|;
-void AddToMean(std::complex<float> data, int count, std::complex<float>* mean);
+void AddToMean(std::complex<float> data,
+               size_t count,
+               std::complex<float>* mean);
 
 // Internal helper for computing the variances of a stream of arrays.
 // The result is an array of variances per position: the i-th variance
@@ -70,7 +72,7 @@ class VarianceArray {
   // |window_size| is the number of samples for kStepWindowed and
   // the number of blocks for kStepBlocked. |decay| is the forgetting factor
   // for kStepDecaying.
-  VarianceArray(int freqs, StepType type, int window_size, float decay);
+  VarianceArray(size_t freqs, StepType type, size_t window_size, float decay);
 
   // Add a new data point to the series and compute the new variances.
   // TODO(bercic) |skip_fudge| is a flag for kStepWindowed and kStepDecaying,
@@ -119,11 +121,11 @@ class VarianceArray {
   rtc::scoped_ptr<float[]> variance_;
   rtc::scoped_ptr<float[]> conj_sum_;
 
-  const int num_freqs_;
-  const int window_size_;
+  const size_t num_freqs_;
+  const size_t window_size_;
   const float decay_;
-  int history_cursor_;
-  int count_;
+  size_t history_cursor_;
+  size_t count_;
   float array_mean_;
   bool buffer_full_;
   void (VarianceArray::*step_func_)(const std::complex<float>*, bool);
@@ -134,7 +136,7 @@ class VarianceArray {
 // constrained by a limit on the magnitude of the changes.
 class GainApplier {
  public:
-  GainApplier(int freqs, float change_limit);
+  GainApplier(size_t freqs, float change_limit);
 
   // Copy |in_block| to |out_block|, multiplied by the current set of gains,
   // and step the current set of gains towards the target set.
@@ -145,7 +147,7 @@ class GainApplier {
   float* target() const { return target_.get(); }
 
  private:
-  const int num_freqs_;
+  const size_t num_freqs_;
   const float change_limit_;
   rtc::scoped_ptr<float[]> target_;
   rtc::scoped_ptr<float[]> current_;