DevTools: NetworkPanel: show link where resource timing is explained.

Source/devtools/front_end/sources/sourcesView.css

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 165 matching lines @@
 .source-frame-infobar-main-row .close-button {
     flex: none;
 }
 
 .source-frame-infobar-toggle {
     flex: 1 0 auto;
     padding: 0 4px;
     -webkit-user-select: none;
 }
 
-.source-frame-infobar-link {
-    text-decoration: underline;
-    color: rgb(50, 50, 200);
-    cursor: pointer;
-}
-
 .source-frame-infobar-details-url {
     flex: 0 1000 auto;
-    color: rgb(50, 50, 200);
 }