Restore <img> src values now that grit converts these.

chrome/browser/resources/shared/css/about_version.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. */
 
 body {
   background-color: white;
   color: black;
   font-family: Helvetica,Arial,sans-serif;
   margin: 0;
 }
@@ skipping 22 matching lines @@
   content: ':';
 }
 
 #logo {
   float: right;
   margin-left: 40px;
   text-align: right;
   width: 180px;
 }
 
-#logo-img {
-  /* TODO: Remove once http://crbug.com/135179 is fixed */
-  content: url('chrome://theme/IDR_PRODUCT_LOGO');
-}
-
 #company {
   font-size: 0.7em;
   text-align: right;
 }
 
 #copyright {
   font-size: 0.7em;
   text-align: right;
 }
 
 #useragent {
   font-family: monospace;
 }
 
 .version {
   font-family: monospace;
   max-width: 430px;
   padding-left: 5px;
 }