Video Player: Show the status icon on display when the status is changed

ui/file_manager/video_player/js/cast/cast_video_element.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';
 
 /**
  * Interval for updating media info (in ms).
  * @type {number}
  * @const
@@ skipping 199 matching lines @@
    */
   get error() {
     if (this.errorCode_ === 0)
       return null;
 
     return {code: this.errorCode_};
   },
 
   /**
    * Plays the video.
+   * @param {boolean=} opt_seeking True when seeking. False otherwise.
    */
-  play: function() {
+  play: function(opt_seeking) {
+    if (this.playInProgress_)
+      return;
+
     var play = function() {
-      this.castMedia_.play(null,
+      if (this.castMedia_.playerState ===
+              chrome.cast.media.PlayerState.PLAYING) {
+        return;
+      }
+
+      var playRequest = new chrome.cast.media.PlayRequest();
+      playRequest.customData = {seeking: !!opt_seeking};
+
+      this.castMedia_.play(
+          playRequest,
           function() {
             this.playInProgress_ = false;
           }.wrap(this),
           function(error) {
             this.playInProgress_ = false;
             this.onCastCommandError_(error);
           }.wrap(this));
     }.wrap(this);
 
     this.playInProgress_ = true;
 
     if (!this.castMedia_)
       this.load(play);
     else
       play();
   },
 
   /**
    * Pauses the video.
+   * @param {boolean=} opt_seeking True when seeking. False otherwise.
    */
-  pause: function() {
+  pause: function(opt_seeking) {
     if (!this.castMedia_)
       return;
 
+    if (this.pauseInProgress_ ||
+        this.castMedia_.playerState === chrome.cast.media.PlayerState.PAUSED) {
+      return;
+    }
+
+    var pauseRequest = new chrome.cast.media.PauseRequest();
+    pauseRequest.customData = {seeking: !!opt_seeking};
+
     this.pauseInProgress_ = true;
-    this.castMedia_.pause(null,
+    this.castMedia_.pause(
+        pauseRequest,
         function() {
           this.pauseInProgress_ = false;
         }.wrap(this),
         function(error) {
           this.pauseInProgress_ = false;
           this.onCastCommandError_(error);
         }.wrap(this));
   },
 
   /**
@@ skipping 205 matching lines @@
       this.dispatchEvent(new Event('durationchange'));
     }
 
     // Media is being unloaded.
     if (!alive) {
       this.unloadMedia_();
       return;
     }
   },
 };