Unified icon-buttons used in the new GAIA flow.

chrome/browser/resources/chromeos/login/gaia_password_changed.css

 /* Copyright 2015 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.
  */
 
 :host {
   height: 100%;
   width: 100%;
 }
 
 core-icon[icon='warning'] {
   color: rgb(255, 193, 7);
   margin: 0 15px 0 0;
 }
 
 :host-context(html[dir=rtl]) core-icon[icon='warning'] {
   margin: 0 0 0 15px;
 }
 
 #closeButton {
-  color: rgb(255, 255, 255);
+  color: white;
   position: absolute;
-  right: 0;
-  top: 0;
+  right: 10px;
+  top: 10px;
   z-index: 1;
 }
 
 :host-context(html[dir=rtl]) #closeButton {
-  left: 0;
+  left: 10px;
   right: auto;
 }
 
 div.margined {
   margin-bottom: 24px;
 }