Audio Player: Notify track metadata update to track-list element explicitly.

ui/file_manager/audio_player/elements/audio_player.js

Index: ui/file_manager/audio_player/elements/audio_player.js
diff --git a/ui/file_manager/audio_player/elements/audio_player.js b/ui/file_manager/audio_player/elements/audio_player.js
index a9945a343e69f94627a2b01a065e3b1074303c19..939865280323d82fc4e5d197fb2fef010469d958 100644
--- a/ui/file_manager/audio_player/elements/audio_player.js
+++ b/ui/file_manager/audio_player/elements/audio_player.js
@@ -349,6 +349,18 @@ Polymer({
   },
 
   /**
+   * Notifis the track-list element that the metadata for specified track is
+   * updated.
+   * @param {number} index The index of the track whose metadata is updated.
+   */
+  notifyTrackMetadataUpdated: function(index) {

[yoshiki, 2016/01/14 11:10:27]

nit: should we check if the argument is valid just in case? 

[fukino, 2016/01/14 11:32:35]

Added a check for index range. Done.

+    this.$.trackList.notifyPath('tracks.' + index + '.title',
+        this.tracks[index].title);
+    this.$.trackList.notifyPath('tracks.' + index + '.artist',
+        this.tracks[index].artist);
+  },
+
+  /**
    * Invoked when the audio player is being unloaded.
    */
   onPageUnload: function() {