[WebUI] Fix rest of CSS style nits so I can turn on CSS checker.

chrome/browser/resources/sync_internals/sync_node_browser.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. */
 
 #sync-node-main {
   display: -webkit-box;
   /* Should be > #sync-page's min-height. */
   /* TODO(akalin): Find a less hacky way to do this. */
   height: 750px;
 }
@@ skipping 15 matching lines @@
   min-width: 100%;
   overflow: visible; /* let the container do the scrolling */
 }
 
 /* TODO(akalin): Find a better icon to use for leaf nodes. */
 #sync-node-tree .leaf .tree-label {
   background-image: url('../shared/images/star_small.png');
 }
 
 #sync-node-splitter {
-  background-color: #ebeff9;
+  background-color: rgb(235, 239, 249);
   cursor: col-resize;
   width: 5px;
 <if expr="is_win">
   /* TODO(akalin): Make the BMM also use this style. */
   cursor: e-resize;
 </if>
 }
 
 #sync-node-browser-container {
   -webkit-box-flex: 1;
   height: 100%;
   overflow: auto;
 }
 
 #node-browser {
   width: 100%;
 }
 
 #node-browser td {
   vertical-align: top;
 }
 
 #node-browser tr:nth-child(odd) {
-  background: #eff3ff;
+  background: rgb(239, 243, 255);
 }