[uber] Redoing the homepage selection UI

chrome/browser/resources/options2/options_page.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 {
   position: relative;
 }
 
 #main-content {
   display: -webkit-box;
@@ skipping 62 matching lines @@
 .hbox {
   display: -webkit-box;
   -webkit-box-orient: horizontal;
 }
 
 .vbox {
   display: -webkit-box;
   -webkit-box-orient: vertical;
 }
 
+.box-align-center {
+  -webkit-box-align: center;
+}
+
 .stretch {
   -webkit-box-flex: 1;
 }
 
 .frozen,
 .subpage-sheet-container.frozen {
   position: fixed;
 }
 
 .search-field-container {
@@ skipping 639 matching lines @@
       url('chrome://theme/IDR_CONTROLLED_SETTING_RECOMMENDED_LARGE');
 }
 
 html[dir='rtl'] .controlled-setting-bubble-text {
   background-position: right top;
 }
 
 .controlled-setting-bubble-action {
   padding: 0 !important;
 }