MD Settings: add a bunch of dialog (X) aria-labels

chrome/browser/resources/settings/reset_page/reset_profile_banner.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="reset_browser_proxy.html">
 <link rel="import" href="../route.html">
 
 <dom-module id="settings-reset-profile-banner">
   <template>
     <style include="settings-shared"></style>
-    <dialog is="cr-dialog" id="dialog" ignore-popstate>
+    <dialog is="cr-dialog" id="dialog" close-text="$i18n{close}" ignore-popstate>
       <div class="title">$i18n{resetAutomatedDialogTitle}</div>
       <div class="body">
         <span id="description">
           $i18n{resetProfileBannerDescription}
           <a id="learnMore"
              href="$i18nRaw{resetProfileBannerLearnMoreUrl}"
              target="_blank">$i18n{learnMore}</a>
         </span>
       </div>
       <div class="button-container">
         <paper-button class="cancel-button" on-tap="onOkTap_" id="ok">
           $i18n{ok}
         </paper-button>
         <paper-button class="action-button" on-tap="onResetTap_" id="reset">
           $i18n{resetProfileBannerButton}
         </paper-button>
       </div>
     </dialog>
   </template>
   <script src="reset_profile_banner.js"></script>
 </dom-module>