predictors: Highlight prefetchable resources in webui.

chrome/browser/resources/predictors/predictors.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 {
   margin: 20px;
 }
 
 #countBanner {
   background-color: rgb(235, 239, 250);
@@ skipping 19 matching lines @@
   white-space: nowrap;
 }
 
 td {
   border-color: lightgray;
   border-style: solid;
   border-width: 1px;
   padding: 3px;
 }
 
+tr td:first-child[rowspan] {

[alexilin, 2017/03/13 15:14:41]

To not highlight a cell with MainFrameUrl/Host together with the first row.

+  background-color: rgb(215, 215, 215);
+}
+
 tbody > td:first-child {
   white-space: nowrap;
 }
 
 #disabledMode h2 {
   color: rgb(141, 51, 42);
   font-size: 125%;
 }
 
 tr.action-prerender td {
   background-color: rgb(0, 215, 0);
 }
 
 tr.action-preconnect td {
   background-color: rgb(255, 215, 0);
 }
 
 tr.action-none td {
   background-color: rgb(215, 215, 215);
 }