Quick View: Added Genre, Track and Duration metadata.

ui/file_manager/file_manager/foreground/js/metadata/metadata_item.js

 // Copyright 2015 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.
 
 /**
  * @typedef {{
  *  scaleX: number,
  *  scaleY: number,
  *  rotate90: number
  * }}
@@ skipping 156 matching lines @@
   this.externalFileUrl;
 
   /**
    * @public {string|undefined}
    */
   this.mediaAlbum;
 
   /**
    * @public {string|undefined}
    */
+  this.mediaArtist;
+
+  /**
+   * Audio or video duration in seconds.
+   * @public {number|undefined}
+   */
+  this.mediaDuration;
+
+  /**
+   * @public {string|undefined}
+   */
+  this.mediaGenre;
+
+  /**
+   * @public {string|undefined}
+   */
   this.mediaTitle;
 
   /**
-   * @public {string|undefined}
+   * @public {number|undefined}
    */
-  this.mediaArtist;
+  this.mediaTrack;
 
   /**
    * Mime type obtained by content provider based on URL.
    * TODO(hirono): Remove the mediaMimeType.
    * @public {string|undefined}
    */
   this.mediaMimeType;
 
   /**
    * "Image File Directory" obtained from EXIF header.
    * @public {!Object|undefined}
    */
   this.ifd;
 
   /**
    * @public {boolean|undefined}
    */
   this.exifLittleEndian;
 }