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

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

Index: webrtc/modules/audio_coding/codecs/ilbc/hp_output.c
diff --git a/webrtc/modules/audio_coding/codecs/ilbc/hp_output.c b/webrtc/modules/audio_coding/codecs/ilbc/hp_output.c
index 3abb427b9a51fdc888635687b5248981e66f9bd8..bd101bf30caf0a07c17eab1a39fd8963b60a2c77 100644
--- a/webrtc/modules/audio_coding/codecs/ilbc/hp_output.c
+++ b/webrtc/modules/audio_coding/codecs/ilbc/hp_output.c
@@ -30,9 +30,9 @@ void WebRtcIlbcfix_HpOutput(
     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;