Move sync_internals resources and constants to //components.

components/sync_driver/resources/events.css

 /* Copyright 2014 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-events-table,
 #sync-events-table th,
 #sync-events-table td {
   border: 1px black solid;
 }
 
 #sync-events-table {
   table-layout: fixed;
   width: 100%;
 }
 
 #sync-events > tr {
   vertical-align: top;
 }
 
 .expanded .attrib-column {
   display: none;
 }