[Sync Promo UI] Focus when asked for ASP.

R=jhawkins@chromium.org
TEST=Use an account with ASP, be able to easily navigate to the ASP input when
prompted on the sync setup overlay and full page promo.
BUG=98928


Review URL: http://codereview.chromium.org/8923008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@114106 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/sync_setup_overlay.js

@@ -592,6 +592,7 @@ cr.define('options', function() {
 
       $('access-code-input-row').hidden = false;
       $('access-code').disabled = false;
+      $('access-code').focus();
     },
 
     showCaptcha_: function(args) {