forgot to revert this, a=beltzner on reverting post-freeze

browser/components/nsBrowserGlue.js

@@ -214,7 +214,7 @@ BrowserGlue.prototype = {
     distro.applyCustomizations();
 
     // handle any UI migration
-    // this._migrateUI();
+    this._migrateUI();
   },
 
   // profile shutdown handler (contains profile cleanup routines)