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

webrtc/modules/audio_coding/codecs/ilbc/hp_input.c

Index: webrtc/modules/audio_coding/codecs/ilbc/hp_input.c
diff --git a/webrtc/modules/audio_coding/codecs/ilbc/hp_input.c b/webrtc/modules/audio_coding/codecs/ilbc/hp_input.c
index 260591ede2dddb9f06e58ca258775a264d0f8fcd..5d8a86050e86522714c89e06ba8afdebe21eb441 100644
--- a/webrtc/modules/audio_coding/codecs/ilbc/hp_input.c
+++ b/webrtc/modules/audio_coding/codecs/ilbc/hp_input.c
@@ -30,9 +30,9 @@ void WebRtcIlbcfix_HpInput(
     int16_t *y,      /* (i/o) Filter state yhi[n-1] ylow[n-1]
                                                                    yhi[n-2] ylow[n-2] */
     int16_t *x,      /* (i/o) Filter state x[n-1] x[n-2] */
-    int16_t len)      /* (i)   Number of samples to filter */
+    size_t len)      /* (i)   Number of samples to filter */
 {
-  int i;
+  size_t i;
   int32_t tmpW32;
   int32_t tmpW32b;