Unified icon-buttons used in the new GAIA flow.

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

 <link rel="import" href="chrome://resources/polymer/polymer/polymer.html">
 <link rel="import" href="chrome://resources/polymer/polymer/layout.html">
 <link rel="import" href="chrome://resources/polymer/core-animated-pages/core-animated-pages.html">
 <link rel="import" href="chrome://resources/polymer/core-animated-pages/transitions/cross-fade.html">
 
 <!--
   Password changed UI for the New Gaia flow.
   Contains two cards with a fade transition between them:
     1. Old password input form.
     2. Warning about data loss
@@ skipping 17 matching lines @@
     'invalidate' - mark password input as invalid.
     'reset'      - reset element, sets in on the first screen and enables
                    buttons.
     'focus'      - if current card is the first one it focuses password input.
 
 -->
 <polymer-element name="gaia-password-changed" vertical layout
     attributes="email">
   <template>
     <link rel="stylesheet" href="gaia_password_changed.css">
-    <gaia-core-icon-button id="closeButton" icon="close" on-tap="{{onClose}}">
-    </gaia-core-icon-button>
     <core-animated-pages id="animatedPages" transitions="cross-fade-all" flex
         on-core-animated-pages-transition-end="{{onTransitionEnd}}">
       <section flex>
         <gaia-card id="oldPasswordCard">
           <gaia-header class="header" email="{{email}}">
           </gaia-header>
           <div horizontal layout center class="footer margined">
             <p class="gaia-body-text"
                 i18n-content="passwordChangedTitle">
             </p>
@@ skipping 32 matching lines @@
               </gaia-raised-on-focus-button>
             </div>
           </div>
         </gaia-card>
       </section>
       <section flex vertical layout center-justified>
         <throbber-notice i18n-values="text:gaiaLoadingNewGaia" self-center>
         </throbber-notice>
       </section>
     </core-animated-pages>
+    <button id="closeButton" is="gaia-icon-button" icon="close"
+        i18n-values="aria-label:closeButton" on-click="{{onClose}}">
+    </button>
   </template>
 </polymer-element>