Convert some more things to size_t.

These changes stem from requests by Andrew on https://codereview.webrtc.org/1228823002/ to eliminate some "return -1"s and change to using asserts plus returning size_ts.  I then also converted the relevant connected bits.

This also cleans up a bunch of style issues, e.g. no spaces around operators.

BUG=chromium:81439
TEST=none
R=andrew@webrtc.org, henrik.lundin@webrtc.org, niklas.enbom@webrtc.org

Review URL: https://codereview.webrtc.org/1305983003 .

Cr-Commit-Position: refs/heads/master@{#9813}

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

@@ -647,7 +647,7 @@ const int16_t WebRtcIlbcfix_kEnhWt[3] = {
   4800, 16384, 27968 /* Q16 */
 };
 
-const int16_t WebRtcIlbcfix_kEnhPlocs[ENH_NBLOCKS_TOT] = {
+const size_t WebRtcIlbcfix_kEnhPlocs[ENH_NBLOCKS_TOT] = {
   160, 480, 800, 1120, 1440, 1760, 2080, 2400  /* Q(-2) */
 };