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

chrome/browser/resources/settings/site_settings/site_details.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/action_link.html">
 <link rel="import" href="chrome://resources/html/action_link_css.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="../route.html">
 <link rel="import" href="../settings_shared_css.html">
 <link rel="import" href="constants.html">
 <link rel="import" href="site_details_permission.html">
 <link rel="import" href="site_settings_behavior.html">
 <link rel="import" href="website_usage_private_api.html">
 
 <dom-module id="site-details">
   <template>
     <style include="settings-shared action-link">
       .favicon-image {
         margin: 2px;
       }
 
       #storage {
         -webkit-padding-end: 0;
       }
     </style>
     <!-- Confirm Delete dialog -->
-    <dialog is="cr-dialog" id="confirmDeleteDialog">
+    <dialog is="cr-dialog" id="confirmDeleteDialog" close-text="$i18n{close}">
       <div class="title">$i18n{siteSettingsSiteRemoveDialogTitle}</div>
       <div class="body">[[confirmationDeleteMsg_]]</div>
       <div class="button-container">
         <paper-button class="cancel-button" on-tap="onCloseDialog_">
           $i18n{cancel}
         </paper-button>
         <paper-button class="action-button" on-tap="onClearStorage_">
           $i18n{siteSettingsSiteClearAll}
         </paper-button>
       </div>
@@ skipping 78 matching lines @@
         </a>
       </div>
     </div>
     <website-usage-private-api id="usageApi"
         website-data-usage="{{storedData_}}"
         website-storage-type="{{storageType_}}">
     </website-usage-private-api>
   </template>
   <script src="site_details.js"></script>
 </dom-module>