Support to repeat one song in Audio Player.

ui/file_manager/audio_player/js/audio_player.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.
 
 /**
  * Overrided metadata worker's path.
  * @type {string}
  */
 ContentMetadataProvider.WORKER_SCRIPT = '/js/metadata_worker.js';
 
@@ skipping 43 matching lines @@
       ['shuffle',
        'repeat',
        'volume',
        'playlist-expanded',
        'track-info-expanded'];
   var storageKeys = KEYS_TO_SAVE_STATES.map(a => STORAGE_PREFIX + a);
   chrome.storage.local.get(storageKeys, function(results) {
     // Update the UI by loaded state.
     for (var storageKey in results) {
       var key = storageKey.substr(STORAGE_PREFIX.length);
+      if(key === 'repeat' && typeof results[storageKey] === 'boolean') {

[fukino, 2016/09/02 12:11:48]

Let's make new key 'repeat-mode' for the string value and eliminate 'repeat' for
simplicity.

[harukam, 2016/09/05 04:35:03]

Acknowledged.

+        results[storageKey] = results[storageKey] ? "repeat-all" : "repeat-none";
+      }
       this.player_[Polymer.CaseMap.dashToCamelCase(key)] = results[storageKey];
     }
     // Start listening to UI changes to write back the states to local storage.
     for (var i = 0; i < KEYS_TO_SAVE_STATES.length; i++) {
       this.player_.addEventListener(
           KEYS_TO_SAVE_STATES[i] + '-changed',
           function(storageKey, event) {
             var objectToBeSaved = {};
             objectToBeSaved[storageKey] = event.detail.value;
             chrome.storage.local.set(objectToBeSaved);
@@ skipping 534 matching lines @@
   // TODO(yoshiki): Handle error in better way.
   this.title = metadata.mediaTitle || this.getDefaultTitle();
   this.artist = error || metadata.mediaArtist || this.getDefaultArtist();
   this.artworkUrl = metadata.contentThumbnailUrl || "";
 };
 
 // Starts loading the audio player.
 window.addEventListener('DOMContentLoaded', function(e) {
   AudioPlayer.load();
 });