Fix for sync setup UI when user is already logged in.

chrome/browser/resources/options/sync_setup_overlay.html

 <div id="sync-setup-overlay" class="page" hidden>
   <div id="sync-setup-login" hidden>
     <h1 i18n-content="syncSetupOverlayTitle"></h1>
     <div class="content-area">
       <div>
         <!-- top-blurb-error's reset state is handled differently from most
              elements. Instead of being [hidden] it is visibility:hidden so it
              still takes up space. But it is also [hidden] when we display the
              captcha, so when it is reset, it needs to be shown. -->
         <div id="top-blurb-error"
@@ skipping 36 matching lines @@
                       <tr id="email-row" class="reset-shown">
                         <td nowrap="nowrap">
                           <div class="end-aligned">
                             <span i18n-content="emailLabel">
                             </span>
                           </div>
                         </td>
                         <td>
                           <input id="gaia-email" type="text" name="email"
                               size="18" value=""
-                              class="reset-enabled reset-value">
-                          <span id="email-readonly" hidden></span>
+                              class="reset-enabled reset-shown reset-value">
+                          <span id="email-readonly" class="reset-hidden"
+                              hidden></span>
                         </td>
                       </tr>
                       <tr id="access-code-label-row"
                           class="access-code-row reset-hidden" hidden>
                         <td colspan="2">
                           <span i18n-content="enterAccessCode"></span>
                         </td>
                       </tr>
                       <tr id="access-code-help-row"
                           class="access-code-row reset-hidden" hidden>
@@ skipping 329 matching lines @@
           </div>
           <div id="choose-datatypes-throbber" class="throbber"></div>
           <input id="choose-datatypes-ok" type="submit" i18n-values="value:ok">
           <input id="choose-datatypes-cancel" type="button"
               i18n-values="value:cancel">
         </div>
       </form>
     </div>
   </div>
 </div>