[MD WebUI] Move icons used in Bookmarks and Settings to shared file.

chrome/browser/resources/settings/about_page/about_page.js

 // Copyright 2016 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.
 
 /**
  * @fileoverview 'settings-about-page' contains version and OS related
  * information.
  */
 Polymer({
   is: 'settings-about-page',
@@ skipping 272 matching lines @@
   },
 
   /**
    * @return {?string}
    * @private
    */
   getIcon_: function() {
     // If this platform has reached the end of the line, display an error icon
     // and ignore UpdateStatus.
     if (this.obsoleteSystemInfo_.endOfLine)
-      return 'settings:error';
+      return 'cr:error';
 
     switch (this.currentUpdateStatusEvent_.status) {
       case UpdateStatus.DISABLED_BY_ADMIN:
         return 'cr:domain';
       case UpdateStatus.FAILED:
-        return 'settings:error';
+        return 'cr:error';
       case UpdateStatus.UPDATED:
       case UpdateStatus.NEARLY_UPDATED:
-          return 'settings:check-circle';
+          return 'cr:check-circle';
       default:
           return null;
     }
   },
 
   /**
    * @return {?string}
    * @private
    */
   getIconSrc_: function() {
@@ skipping 83 matching lines @@
     });
   },
 
 <if expr="_google_chrome">
   /** @private */
   onReportIssueTap_: function() {
     this.aboutBrowserProxy_.openFeedbackDialog();
   },
 </if>
 });