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

webrtc/modules/audio_coding/codecs/g711/g711_interface.c

Index: webrtc/modules/audio_coding/codecs/g711/g711_interface.c
diff --git a/webrtc/modules/audio_coding/codecs/g711/g711_interface.c b/webrtc/modules/audio_coding/codecs/g711/g711_interface.c
index b5795209f70bf35c07cd7531cbdb3822fa91f013..5b96a9c5553f41747f9c13d85116d7ec09053b1b 100644
--- a/webrtc/modules/audio_coding/codecs/g711/g711_interface.c
+++ b/webrtc/modules/audio_coding/codecs/g711/g711_interface.c
@@ -12,40 +12,40 @@
 #include "g711_interface.h"
 #include "webrtc/typedefs.h"
 
-int16_t WebRtcG711_EncodeA(const int16_t* speechIn,
-                           int16_t len,
-                           uint8_t* encoded) {
-  int n;
+size_t WebRtcG711_EncodeA(const int16_t* speechIn,
+                          size_t len,
+                          uint8_t* encoded) {
+  size_t n;
   for (n = 0; n < len; n++)
     encoded[n] = linear_to_alaw(speechIn[n]);
   return len;
 }
 
-int16_t WebRtcG711_EncodeU(const int16_t* speechIn,
-                           int16_t len,
-                           uint8_t* encoded) {
-  int n;
+size_t WebRtcG711_EncodeU(const int16_t* speechIn,
+                          size_t len,
+                          uint8_t* encoded) {
+  size_t n;
   for (n = 0; n < len; n++)
     encoded[n] = linear_to_ulaw(speechIn[n]);
   return len;
 }
 
-int16_t WebRtcG711_DecodeA(const uint8_t* encoded,
-                           int16_t len,
-                           int16_t* decoded,
-                           int16_t* speechType) {
-  int n;
+size_t WebRtcG711_DecodeA(const uint8_t* encoded,
+                          size_t len,
+                          int16_t* decoded,
+                          int16_t* speechType) {
+  size_t n;
   for (n = 0; n < len; n++)
     decoded[n] = alaw_to_linear(encoded[n]);
   *speechType = 1;
   return len;
 }
 
-int16_t WebRtcG711_DecodeU(const uint8_t* encoded,
-                           int16_t len,
-                           int16_t* decoded,
-                           int16_t* speechType) {
-  int n;
+size_t WebRtcG711_DecodeU(const uint8_t* encoded,
+                          size_t len,
+                          int16_t* decoded,
+                          int16_t* speechType) {
+  size_t n;
   for (n = 0; n < len; n++)
     decoded[n] = ulaw_to_linear(encoded[n]);
   *speechType = 1;