MD Downloads: preload bold Roboto in a better way

chrome/browser/resources/md_downloads/crisper.js

 // Copyright (c) 2013 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.
 function assert(condition, opt_message) {
   if (!condition) {
     var message = 'Assertion failed';
     if (opt_message) message = message + ': ' + opt_message;
     var error = new Error(message);
     var global = function() {
       return this;
@@ skipping 6978 matching lines @@
     Manager.get().updateItem_(index, data);
   };
   return {
     Manager: Manager
   };
 });
 
 // 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.
-window.addEventListener('load', downloads.Manager.onLoad);
+window.addEventListener('load', function() {
+  downloads.Manager.onLoad();
+  if (!cr.isChromeOS) {
+    new FontFace('Roboto', "local('Roboto Bold'), local('Roboto-Bold'), " + "url(chrome://resources/roboto/roboto-bold.woff2) format('woff2')", {
+      weight: 'bold'
+    }).load();
+  }
+});