Do not bundle Roboto on CrOS

chrome/browser/resources/md_downloads/vulcanized.html

Index: chrome/browser/resources/md_downloads/vulcanized.html
diff --git a/chrome/browser/resources/md_downloads/vulcanized.html b/chrome/browser/resources/md_downloads/vulcanized.html
index db733349460b50d513a0f5b8fd0b83bdd2185a81..b90a219ec38ce5dae9c9c85148f44795c9f497cc 100644
--- a/chrome/browser/resources/md_downloads/vulcanized.html
+++ b/chrome/browser/resources/md_downloads/vulcanized.html
@@ -1639,6 +1639,7 @@ paper-button {
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
+<if expr="not chromeos">
 @font-face {
   font-family: 'Roboto';
   font-style: normal;
@@ -1662,6 +1663,7 @@ paper-button {
   src: local('Roboto Bold'), local('Roboto-Bold'),
       url("chrome://resources/roboto/roboto-bold.woff2") format('woff2');
 }
+</if>
 
 </style>
 <style is="custom-style">
@@ -2779,4 +2781,4 @@ paper-button {
   <command id="find-command" shortcut="Ctrl|f"></command>
 </if>
   <link rel="import" href="chrome://resources/html/polymer.html">
-  <script src="crisper.js"></script></body></html>
+  <script src="crisper.js"></script></body></html>