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..905c2bea30a6a11e91600b6a8a84845efec14e88 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('promo-not-startup', true);

[Dan Beam, 2012/03/26 21:35:20]

nit: I think other attributes in NTP have no hyphens or capitialization (see:
bookmarksbarattached or hasattribution or spellcheck).

[sail, 2012/03/26 21:37:15]

Done.

     },
 
     /**