Video Player: Call video element's load method on loading video file.

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.
 
 /**
  * @param {!HTMLElement} playerContainer Main container.
  * @param {!HTMLElement} videoContainer Container for the video element.
  * @param {!HTMLElement} controlsContainer Container for video controls.
  * @constructor
  * @struct
@@ skipping 405 matching lines @@
 
           this.videoElement_.addEventListener('play', function() {
             chrome.power.requestKeepAwake('display');
             this.updateInactivityWatcherState_();
           }.wrap(this));
           this.videoElement_.addEventListener('pause', function() {
             chrome.power.releaseKeepAwake();
             this.updateInactivityWatcherState_();
           }.wrap(this));
           this.controls.attachMedia(this.videoElement_);
-          // TODO(ryoh):
-          // If you modify the video element that is already inserted,
-          // you have to call load() method.
-          // https://dev.w3.org/html5/spec-author-view/video.html
-          // But we always create new video element (see above),
-          // we don't have to call load().
-          // If you call load() method here,
-          // you can't see subtitles.
-          // (It might be a bug: https://crbug.com/594537)
-          //this.videoElement_.load();
+          this.videoElement_.load();
           callback();
         }.bind(this))
         // In case of error.
         .catch(function(error) {
           if (this.currentCast_)
             metrics.recordCastVideoErrorAction();
 
           videoPlayerElement.removeAttribute('loading');
           console.error('Failed to initialize the video element.',
                         error.stack || error);
@@ skipping 295 matching lines @@
   return new Promise(function(fulfill, reject) {
     util.URLsToEntries(window.appState.items, function(entries) {
       metrics.recordOpenVideoPlayerAction();
       metrics.recordNumberOfOpenedFiles(entries.length);
 
       player.prepare(entries);
       player.playFirstVideo(player, fulfill);
     }.wrap());
   }.wrap());
 }.wrap());