Move history resources into a sub-directory.

chrome/browser/resources/history/history.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.
  */
 
 #editing-controls {
   margin-top: 16px;
   white-space: nowrap;
 }
 
@@ skipping 167 matching lines @@
   /* Make room for the favicon. */
   -webkit-padding-start: 20px;
 
   /* Control the favicon appearance. */
   background-position-y: 3px;
   background-repeat: no-repeat;
 }
 
 .entry .starred {
   -webkit-margin-start: 4px;
-  background: url('shared/images/star_small.png') no-repeat;
+  background: url('../shared/images/star_small.png') no-repeat;
   display: inline-block;
   height: 11px;
   width: 11px;
 }
 
 .entry .title > a {
   color: rgb(48, 57, 66);
   text-decoration: none;
 }
 
 .entry .title > a.to-be-removed {
   text-decoration: line-through;
 }
 
 .entry .title > a:hover {
   text-decoration: underline;
 }
 
 .fade-out {
   -webkit-transition: opacity 200ms;
   opacity: 0;
 }
 
 .page-navigation {
   -webkit-margin-end: 4px;
   background-color: rgb(235, 239, 249);
   padding: 8px;
 }