Un-wrap long url lines in the supervised user interstitial css.

chrome/browser/resources/supervised_user_block_interstitial.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. */
 body {
   background-color: rgb(230, 230, 230);
   font-family: Helvetica, Arial, sans-serif;
   font-size: 10pt;
   margin: 50px 40px 20px 40px;
   text-align: center;
 }
@@ skipping 27 matching lines @@
 a {
   color: rgb(17, 85, 204);
   text-decoration: none;
 }
 
 .error-img {
   /* Can't access chrome:// urls from an untrusted renderer process, so embed
    * the resource manually. */
   -webkit-user-select: none;
   content: -webkit-image-set(
-      url('../../app/theme/default_100_percent/common/'
-              'error_managed_mode_blocked_page.png') 1x,
-      url('../../app/theme/default_200_percent/common/'
-              'error_managed_mode_blocked_page.png') 2x);
+      url('../../app/theme/default_100_percent/common/error_managed_mode_blocked_page.png') 1x,
+      url('../../app/theme/default_200_percent/common/error_managed_mode_blocked_page.png') 2x);
   margin-bottom: 10px;
   margin-top: 10px;
 }
 
 #content-top {
   margin: 20px 20px 20px 25px;
 }
 
 button {
   -webkit-user-select: none;
@@ skipping 15 matching lines @@
   background-image: linear-gradient(rgb(84, 153, 244) 5%,
                                     rgb(82, 148, 242) 50%,
                                     rgb(75, 133, 241));
   border: 1px solid rgb(81, 135, 223);
   border-bottom: 1px solid rgb(56, 112, 207);
   box-shadow: inset 0 1px 0 rgb(95, 168, 247);
   color: rgb(255, 255, 255);
   text-shadow: 0 1px 0 rgba(0, 0, 0, 0.2);
   width: 100px;
 }