Switch security warning font to Roboto if client has it

chrome/browser/resources/security_warnings/interstitial_v2.css

 /* 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. */
+@font-face {
+  font-family: 'Roboto2';
+  font-weight: 400;
+  src: local('Roboto'), local('Roboto2-Regular');
+}
 
 a {
   color: #585858;
 }
 
 body {
   background-color: #f7f7f7;
   color: #585858;
+  font-family: 'Roboto2';
   font-size: 125%;
 }
 
 body.safe-browsing {
   background-color: rgb(206, 52, 38);
   color: white;
 }
 
 button {
   background: rgb(76, 142, 250);
@@ skipping 224 matching lines @@
   }
 
   .nav-wrapper {
     margin-top: 30px;
   }
 
   .small-link {
     font-size: 1em;
   }
 }