AudioPlayer: Start playing a track when play icon on the track list is clicked.

ui/file_manager/audio_player/elements/audio_player.js

 // Copyright 2014 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.
 
 Polymer({
   is: 'audio-player',
 
   properties: {
     /**
      * Flag whether the audio is playing or paused. True if playing, or false
@@ skipping 257 matching lines @@
    * This handler is registered in this.ready().
    * @private
    */
   onAudioStatusUpdate_: function() {
     this.time = (this.lastAudioUpdateTime_ = this.$.audio.currentTime * 1000);
     this.duration = this.$.audio.duration * 1000;
     this.playing = !this.$.audio.paused;
   },
 
   /**
+   * Invoked when receivig a request to start playing the current music.
+   */
+  onPlayCurrentTrack: function() {
+    this.$.audio.play();
+  },
+
+  /**
    * Invoked when receiving a request to replay the current music from the track
    * list element.
    */
   onReplayCurrentTrack: function() {
     // Changes the current time back to the beginning, regardless of the current
     // status (playing or paused).
     this.$.audio.currentTime = 0;
     this.time = 0;
   },
 
@@ skipping 146 matching lines @@
 
   /**
    * Computes volume value for audio element. (should be in [0.0, 1.0])
    * @param {number} volume Volume which is set in the UI. ([0, 100])
    * @return {number}
    */
   computeAudioVolume_: function(volume) {
     return volume / 100;
   }
 });