[Cleanup] Files.app: Fill 'TODO' comments to missing descriptions in @return annotation.

chrome/browser/resources/file_manager/js/metadata/id3_parser.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 importScripts('function_sequence.js');
 importScripts('function_parallel.js');
 
 function Id3Parser(parent) {
   MetadataParser.call(this, parent, 'id3', /\.(mp3)$/i);
 }
 
 Id3Parser.prototype = {__proto__: MetadataParser.prototype};
 
 /**
  * Reads synchsafe integer.
  * 'SynchSafe' term is taken from id3 documentation.
  *
  * @private
  * @param {ByteReader} reader - reader to use.
  * @param {int} length - bytes to read.
- * @return {int}
+ * @return {int}  //TODO(JSDOC).
  */
 Id3Parser.readSynchSafe_ = function(reader, length) {
   var rv = 0;
 
   switch (length) {
     case 4:
       rv = reader.readScalar(1, false) << 21;
     case 3:
       rv |= reader.readScalar(1, false) << 14;
     case 2:
       rv |= reader.readScalar(1, false) << 7;
     case 1:
       rv |= reader.readScalar(1, false);
   }
 
   return rv;
 };
 
 /**
  * Reads 3bytes integer.
  *
  * @private
  * @param {ByteReader} reader - reader to use.
+ * @return {int}  //TODO(JSDOC).
  * @return {int}
  */
 Id3Parser.readUInt24_ = function(reader) {
   return reader.readScalar(2, false) << 16 | reader.readScalar(1, false);
 };
 
 /**
  * Reads string from reader with specified encoding
  *
  * @private
@@ skipping 640 matching lines @@
     TYER: 'ID3_YEAR',
     WCOP: 'ID3_COPYRIGHT',
     WOAF: 'ID3_OFFICIAL_AUDIO_FILE_WEBPAGE',
     WOAR: 'ID3_OFFICIAL_ARTIST',
     WOAS: 'ID3_OFFICIAL_AUDIO_SOURCE_WEBPAGE',
     WPUB: 'ID3_PUBLISHERS_OFFICIAL_WEBPAGE'
   }
 };
 
 MetadataDispatcher.registerParserClass(Id3Parser);