[Media Router] Increment the media's current_time in the WebUI route controller

chrome/common/media_router/mojo/media_status.mojom

 // Copyright 2017 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.
 
 module media_router.mojom;
 
 import "mojo/common/time.mojom";
 
 // Represents the current state of a media content. This struct should be kept
 // free of details specific to Media Router, so that it can be moved to the
 // media namespace and be reused for other features in the future.
 struct MediaStatus {
+  enum PlayState {
+    PLAYING,
+    PAUSED,
+    BUFFERING
+  };
+
   // The main title of the media. For example, in a MediaStatus representing
   // a YouTube Cast session, this could be the title of the video.
   string title;
 
   // Text describing the media, or a secondary title. For example, in a
   // MediaStatus representing a YouTube Cast session, this could be "YouTube".
   string description;
 
   // If this is true, the media can be played and paused through its
   // MediaController.
   bool can_play_pause;
 
   // If this is true, the media can be muted and unmuted through its
   // MediaController.
   bool can_mute;
 
   // If this is true, the media's volume can be changed through its
   // MediaController.
   bool can_set_volume;
 
   // If this is true, the media's current playback position can be changed
   // through its MediaController.
   bool can_seek;
 
-  bool is_paused;
+  // Whether the media is playing, paused, or buffering.
+  PlayState play_state;
 
   bool is_muted;
 
   // Current volume of the media, with 1 being the highest and 0 being the
   // lowest/no sound. When |is_muted| is true, there should be no sound
   // regardless of |volume|.
   float volume;
 
   // The length of the media. A value of 0 indicates that this is a media with
   // no set duration (e.g. a live stream).
   mojo.common.mojom.TimeDelta duration;
 
   // Current playback position. Must be less than or equal to |duration|.
   mojo.common.mojom.TimeDelta current_time;
 };
 
 // Interface for being notified whenever the MediaStatus of a media changes.
 // This interface should be kept free of details specific to Media Router, so
 // that it can be moved to the media namespace and be reused for other features
 // in the future.
 interface MediaStatusObserver {
   OnMediaStatusUpdated(MediaStatus status);
 };