[Cleanup] Files.app: Adds missing periods at the end of the descriptions.

chrome/browser/resources/file_manager/js/media/player_testapi.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.
 
 /**
  * Test API for Chrome OS Video Player and Audio Player.
  *
  * To test the Video Player open a tab with the URL:
  *   chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/video_player.html
  *
@@ skipping 75 matching lines @@
 
   /**
    * Respond with a number, current volume [0..100].
    */
   getVolume: function() {
     this.respond_(this.getMedia_().volume * 100);
   },
 
   /**
    * Change volume.
-   * @param {number} volume Volume [0..100]
+   * @param {number} volume Volume [0..100].
    */
   setVolume: function(volume) {
     this.respond_(this.getControls_().onVolumeChange_(volume / 100));
   },
 
   /**
    * Respond with a boolean, true if the volume is muted.
    */
   isMuted: function() {
     this.respond_(this.getMedia_().volume == 0);
@@ skipping 74 matching lines @@
    * @param {string|boolean|number} value Value to send back.
    * @private
    */
   respond_: function(value) {
     if (window.domAutomationController)
       window.domAutomationController.send(value);
     else
       console.log('playerTestAPI response: ' + value);
   }
 };