Fix incorrect assert() for interrupted/paused/in progress downloads.

chrome/browser/resources/downloads/item_view.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.
 
 cr.define('downloads', function() {
   /** @const */ var Item = downloads.Item;
 
   /**
    * Creates and updates the DOM representation for a download.
    * @constructor
@@ skipping 328 matching lines @@
 
     /**
      * @param {!downloads.Data} data
      * @return {string} User-visible status update text.
      * @private
      */
     getStatusText_: function(data) {
       switch (data.state) {
         case Item.States.IN_PROGRESS:
         case Item.States.PAUSED:  // Fallthrough.
-          return assert(data.progress_status_text);
+          assert(typeof data.progress_status_text == 'string');
+          return data.progress_status_text;
         case Item.States.CANCELLED:
           return loadTimeData.getString('status_cancelled');
         case Item.States.DANGEROUS:
           break;  // Intentionally hit assertNotReached(); at bottom.
         case Item.States.INTERRUPTED:
-          return assert(data.last_reason_text);
+          assert(typeof data.last_reason_text == 'string');
+          return data.last_reason_text;
         case Item.States.COMPLETE:
           return data.file_externally_removed ?
               loadTimeData.getString('status_removed') : '';
       }
       assertNotReached();
       return '';
     },
 
     /**
      * @private
@@ skipping 54 matching lines @@
     },
 
     /** @private */
     onDiscardClick_: function() {
       chrome.send('discardDangerous', [this.id_]);
     },
   };
 
   return {ItemView: ItemView};
 });