Reformat existing code. There should be no functional effects.

This includes changes like:
* Attempt to break lines at better positions
* Use "override" in more places, don't use "virtual" with it
* Use {} where the body is more than one line
* Make declaration and definition arg names match
* Eliminate unused code
* EXPECT_EQ(expected, actual) (but use (actual, expected) for e.g. _GT)
* Correct #include order
* Use anonymous namespaces in preference to "static" for file-scoping
* Eliminate unnecessary casts
* Update reference code in comments of ARM assembly sources to match actual current C code
* Fix indenting to be more style-guide compliant
* Use arraysize() in more places
* Use bool instead of int for "boolean" values (0/1)
* Shorten and simplify code
* Spaces around operators
* 80 column limit
* Use const more consistently
* Space goes after '*' in type name, not before
* Remove unnecessary return values
* Use "(var == const)", not "(const == var)"
* Spelling
* Prefer true, typed constants to "enum hack" constants
* Avoid "virtual" on non-overridden functions
* ASSERT(x == y) -> ASSERT_EQ(y, x)

BUG=none
R=andrew@webrtc.org, asapersson@webrtc.org, henrika@webrtc.org, juberti@webrtc.org, kjellander@webrtc.org, kwiberg@webrtc.org

Review URL: https://codereview.webrtc.org/1172163004

Cr-Commit-Position: refs/heads/master@{#9420}

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

@@ -52,13 +52,6 @@ int16_t WebRtcG711_DecodeU(const uint8_t* encoded,
   return len;
 }
 
-int WebRtcG711_DurationEst(const uint8_t* payload,
-                           int payload_length_bytes) {
-  (void) payload;
-  /* G.711 is one byte per sample, so we can just return the number of bytes. */
-  return payload_length_bytes;
-}
-
 int16_t WebRtcG711_Version(char* version, int16_t lenBytes) {
   strncpy(version, "2.0.0", lenBytes);
   return 0;