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

chrome/browser/resources/supervised_user_block_interstitial.css

Index: chrome/browser/resources/supervised_user_block_interstitial.css
diff --git a/chrome/browser/resources/supervised_user_block_interstitial.css b/chrome/browser/resources/supervised_user_block_interstitial.css
index 7832dee4d1319aa78f1252da4c6aa5c526444b9c..257924699a8fa37be34d74aaf1211f3c1a5e8080 100644
--- a/chrome/browser/resources/supervised_user_block_interstitial.css
+++ b/chrome/browser/resources/supervised_user_block_interstitial.css
@@ -45,10 +45,8 @@ a {
    * 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;
 }