Sync promo: Only show skip button on startup

chrome/browser/resources/sync_promo/sync_promo.js

Index: chrome/browser/resources/sync_promo/sync_promo.js
diff --git a/chrome/browser/resources/sync_promo/sync_promo.js b/chrome/browser/resources/sync_promo/sync_promo.js
index 5ebde1ec02f0cc7f2d09281a1080582a977cc94e..10e0aa2f85a02895b8a53ae632d519fdc2527e56 100644
--- a/chrome/browser/resources/sync_promo/sync_promo.js
+++ b/chrome/browser/resources/sync_promo/sync_promo.js
@@ -132,6 +132,12 @@ cr.define('sync_promo', function() {
       };
       $('confirm-everything-cancel').addEventListener('click', cancelFunc);
       $('choose-datatypes-cancel').addEventListener('click', cancelFunc);
+
+      // Add the source parameter to the document so that it can be used to
+      // selectively show and hide elements using CSS.
+      var params = parseQueryParams(document.location);
+      if (params.source != '0')
+        document.documentElement.setAttribute('promoNotStartup', true);

[Dan Beam, 2012/03/26 22:09:00]

nit: I think we tend to use all lower case because it's pretty unclear in the
CSS 2.1 spec whether case matters
(http://www.w3.org/TR/CSS2/selector.html#matching-attrs), but this is more
readable, so up to you.

[sail, 2012/03/26 22:34:44]

Done.

     },
 
     /**