Allow to close the video player with ctrl-w.

ui/file_manager/video_player/js/video_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.
 
 'use strict';
 
 /**
  * @param {Element} playerContainer Main container.
  * @param {Element} videoContainer Container for the video element.
  * @param {Element} controlsContainer Container for video controls.
@@ skipping 29 matching lines @@
         player.advance_(1);
         break;
       case 'Left':
       case 'MediaPreviousTrack':
         player.advance_(0);
         break;
       case 'MediaStop':
         // TODO: Define "Stop" behavior.
         break;
     }
-    e.preventDefault();
   }.wrap(this));
 
   // TODO(mtomasz): Simplify. crbug.com/254318.
   var clickInProgress = false;
   videoContainer.addEventListener('click', function(e) {
     if (clickInProgress)
       return;
 
     clickInProgress = true;
     var togglePlayState = function() {
@@ skipping 545 matching lines @@
 var initPromise = Promise.all(
     [new Promise(initVideos.wrap(null)),
      new Promise(initStrings.wrap(null)),
      new Promise(util.addPageLoadHandler.wrap(null))]);
 
 initPromise.then(function(results) {
   var videos = results[0];
   player.prepare(videos);
   return new Promise(player.playFirstVideo.wrap(player));
 }.wrap(null));