[i18n] chromeos login i18n-content to $i18n{}

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

 <!-- Copyright 2016 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. -->
 
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 
 <!--
   Unrecoverable cryptohome error card that shows to use when an unrecoverable
   cryptohome error happens. It asks user to help us debugging the issue by
   sending us a feedback and allows user to re-create the cryptohome so that
   the device could still be used.
 
   Events:
     'done' - fired when user clicks on continue button.
 -->
 <dom-module name="unrecoverable-cryptohome-error-card">
   <link rel="stylesheet" href="unrecoverable_cryptohome_error_card.css">
 
   <template>
     <div class="content">
-      <div i18n-content="unrecoverableCryptohomeErrorMessageTitle" class="title">
-      </div>
+      <div class="title">$i18n{unrecoverableCryptohomeErrorMessageTitle}</div>
       <div class="message"
           i18n-values=".innerHTML:unrecoverableCryptohomeErrorMessage">
       </div>
       <div class="horizontal-reverse layout justified center">
-        <gaia-button on-tap="onContinueClicked_"
-            i18n-content="unrecoverableCryptohomeErrorContinue">
+        <gaia-button on-tap="onContinueClicked_">
+          $i18n{unrecoverableCryptohomeErrorContinue}
         </gaia-button>
       </div>
     </div>
   </template>
 </dom-module>