Update audio code to use size_t more correctly, webrtc/modules/audio_processing/

webrtc/modules/audio_processing/intelligibility/intelligibility_proc.cc

Index: webrtc/modules/audio_processing/intelligibility/intelligibility_proc.cc
diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_proc.cc b/webrtc/modules/audio_processing/intelligibility/intelligibility_proc.cc
index 9f7d84e701af6b0a9f303866ae999e6dbec8c613..fbf6dd68f56fba62a33e6855285c273f5a8bedca 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_proc.cc
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_proc.cc
@@ -33,9 +33,11 @@
 using std::complex;
 
 namespace webrtc {
+namespace {
 
-using webrtc::RealFourier;
-using webrtc::IntelligibilityEnhancer;
+bool ValidateClearWindow(const char* flagname, int32_t value) {
+  return value >= 0;
+}
 
 DEFINE_int32(clear_type,
              webrtc::intelligibility::VarianceArray::kStepInfinite,
@@ -44,6 +46,8 @@ DEFINE_double(clear_alpha, 0.9, "Variance decay factor for clear data.");
 DEFINE_int32(clear_window,
              475,
              "Window size for windowed variance for clear data.");
+const bool clear_window_dummy =
+    google::RegisterFlagValidator(&FLAGS_clear_window, &ValidateClearWindow);
 DEFINE_int32(sample_rate,
              16000,
              "Audio sample rate used in the input and output files.");
@@ -64,7 +68,7 @@ DEFINE_string(out_file,
               "play through aplay immediately.");
 
 // Constant IntelligibilityEnhancer constructor parameters.
-const int kErbResolution = 2;
+const size_t kErbResolution = 2;
 const int kNumChannels = 1;
 
 // void function for gtest
@@ -107,8 +111,9 @@ void void_main(int argc, char* argv[]) {
 
   IntelligibilityEnhancer enh(
       kErbResolution, FLAGS_sample_rate, kNumChannels, FLAGS_clear_type,
-      static_cast<float>(FLAGS_clear_alpha), FLAGS_clear_window, FLAGS_ana_rate,
-      FLAGS_var_rate, FLAGS_gain_limit);
+      static_cast<float>(FLAGS_clear_alpha),
+      static_cast<size_t>(FLAGS_clear_window), FLAGS_ana_rate, FLAGS_var_rate,
+      FLAGS_gain_limit);
 
   // Slice the input into smaller chunks, as the APM would do, and feed them
   // through the enhancer.
@@ -137,6 +142,7 @@ void void_main(int argc, char* argv[]) {
   }
 }
 
+}  // namespace
 }  // namespace webrtc
 
 int main(int argc, char* argv[]) {