Video Player: Keep the display awake during playing a video

ui/file_manager/video_player/js/video_player.js

Index: ui/file_manager/video_player/js/video_player.js
diff --git a/ui/file_manager/video_player/js/video_player.js b/ui/file_manager/video_player/js/video_player.js
index 6ea56b53d45e457b521c4d77b698ab7bd989b7b9..ae90d0bdd9c8f654ff0d8000c8f4a22d6fdfd082 100644
--- a/ui/file_manager/video_player/js/video_player.js
+++ b/ui/file_manager/video_player/js/video_player.js
@@ -264,6 +264,9 @@ VideoPlayer.prototype.prepare = function(videos) {
  * Unloads the player.
  */
 function unload() {
+  // Releases keep awake just in case (should be released on unloading video).
+  chrome.power.releaseKeepAwake();
+
   if (!player.controls || !player.controls.getMedia())
     return;
 
@@ -380,6 +383,14 @@ VideoPlayer.prototype.loadVideo_ = function(video, opt_callback) {
           }.wrap(this, this.currentPos_);
 
           this.videoElement_.addEventListener('loadedmetadata', handler);
+
+          this.videoElement_.addEventListener('play', function() {
+            chrome.power.requestKeepAwake('display');
+          }.wrap());
+          this.videoElement_.addEventListener('pause', function() {
+            chrome.power.releaseKeepAwake();
+          }.wrap());
+
           this.videoElement_.load();
           callback();
         }.bind(this)).
@@ -409,6 +420,8 @@ VideoPlayer.prototype.playFirstVideo = function() {
  */
 VideoPlayer.prototype.unloadVideo = function(opt_keepSession) {
   this.loadQueue_.run(function(callback) {
+    chrome.power.releaseKeepAwake();
+
     if (this.videoElement_) {
       // If the element has dispose method, call it (CastVideoElement has it).
       if (this.videoElement_.dispose)