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

webrtc/modules/audio_coding/neteq/delay_manager.h

Index: webrtc/modules/audio_coding/neteq/delay_manager.h
diff --git a/webrtc/modules/audio_coding/neteq/delay_manager.h b/webrtc/modules/audio_coding/neteq/delay_manager.h
index 33c4a40a6a87e4d6d92e79f0d5d047bf04c1fc07..b0d3f2e4e82bd6882159184ea46ebf4b7af71456 100644
--- a/webrtc/modules/audio_coding/neteq/delay_manager.h
+++ b/webrtc/modules/audio_coding/neteq/delay_manager.h
@@ -32,7 +32,7 @@ class DelayManager {
   // buffer can hold no more than |max_packets_in_buffer| packets (i.e., this
   // is the number of packet slots in the buffer). Supply a PeakDetector
   // object to the DelayManager.
-  DelayManager(int max_packets_in_buffer, DelayPeakDetector* peak_detector);
+  DelayManager(size_t max_packets_in_buffer, DelayPeakDetector* peak_detector);
 
   virtual ~DelayManager();
 
@@ -132,7 +132,7 @@ class DelayManager {
   void LimitTargetLevel();
 
   bool first_packet_received_;
-  const int max_packets_in_buffer_;  // Capacity of the packet buffer.
+  const size_t max_packets_in_buffer_;  // Capacity of the packet buffer.
   IATVector iat_vector_;  // Histogram of inter-arrival times.
   int iat_factor_;  // Forgetting factor for updating the IAT histogram (Q15).
   int packet_iat_count_ms_;  // Milliseconds elapsed since last packet.