Add error handling for supervised user import flow.

chrome/browser/resources/options/manage_profile_overlay.html

 <div id="manage-profile-overlay" class="page" hidden>
   <div class="close-button"></div>
   <!-- Dialog for managing profiles. -->
   <div id="manage-profile-overlay-manage" hidden>
     <h1 i18n-content="manageProfile"></h1>
     <div id="manage-profile-content" class="content-area">
       <div id="manage-profile-icon-label"
           i18n-content="manageProfilesIconLabel">
       </div>
       <grid id="manage-profile-icon-grid"></grid>
@@ skipping 48 matching lines @@
       <div id="create-profile-instructions"></div>
       <grid id="create-profile-icon-grid"></grid>
       <div id="create-profile-name-input-container">
         <label>
           <span id="create-profile-name-label" for="create-profile-name"
               i18n-content="manageProfilesNameLabel">
           </span>
           <input id="create-profile-name" type="text" required>
         </label>
       </div>
-      <div id="create-profile-error-bubble" hidden></div>
     </div>
     <div id="create-profile-managed-content-area" class="content-area">
       <div id="create-shortcut-container" class="checkbox" hidden>
         <label>
           <input id="create-shortcut" type="checkbox">
           <span for="create-shortcut"
               i18n-content="createProfileShortcutCheckbox">
           </span>
         </label>
       </div>
@@ skipping 21 matching lines @@
                 class="link-button"
                 i18n-content="manageProfilesManagedNotSignedInLink">
             </button>
           </span>
         </label>
         <span id="create-profile-managed-indicator"
             class="bubble-button controlled-setting-indicator">
         </span>
       </div>
     </div>
+    <div id="create-profile-error-bubble-content-area" class="content-area">
+      <div id="create-profile-error-bubble" hidden></div>
+    </div>
     <div class="action-area">
       <div id="create-profile-throbber" class="throbber"></div>
       <button id="import-existing-managed-user-link" class="link-button"
-          i18n-content="importExistingManagedUserLink">
+          i18n-content="importExistingManagedUserLink" hidden>
       </button>
       <div class="button-strip">
         <button id="create-profile-cancel" i18n-content="cancel"></button>
         <button id="create-profile-ok" i18n-content="createProfileConfirm"
             class="default-button">
         </button>
       </div>
     </div>
   </div>
 </div>