[uber page] Update web-ui font settings

chrome/browser/resources/shared/css/chrome_shared2.css

 /* Copyright (c) 2012 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. */
 
 /* This file holds CSS that should be shared, in theory, by all user-visible
  * chrome:// pages. This contrasts chrome_shared.css, which it is meant to
  * replace, but has CSS specific to options and options-like pages. */
 
 @import url("chrome://resources/css/button.css");
 @import url("chrome://resources/css/checkbox.css");
 
 /* Prevent CSS from overriding the hidden property. */
 [hidden] {
   display: none !important;
 }
 
 body {
   cursor: default;
-  font-family: 'Open Sans', sans-serif;
-  font-size: 12px;
   margin: 0;
 }
 
 p {
-  line-height: 22px;
+  line-height: 1.8em;
 }
 
 h1 {
   -webkit-user-select: none;
   color: rgb(48, 57, 66);
-  font-size: 18px;
+  font-size: 1.2em;
   font-weight: normal;
   margin-top: 1em;
 }
 
 a {
   color: rgb(17, 85, 204);
   text-decoration: underline;
 }
 
 a:active {
@@ skipping 88 matching lines @@
  * For now it's a bandaid until we install open sans properly. */
 <if expr="not pp_ifdef('chromeos')">
 @font-face {
   font-family: 'Open Sans';
   font-style: normal;
   font-weight: 400;
   src: local('Open Sans'), local('OpenSans'),
       url('chrome://resources/fonts/open_sans.woff') format('woff');
 }
 </if>