Fix supervised user dialog close regression.

BUG=399686
R=michaelpg@chromium.org

Review URL: https://codereview.chromium.org/426783006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287035 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/options/supervised_user_learn_more.js

@@ -28,7 +28,7 @@ cr.define('options', function() {
       Page.prototype.initializePage.call(this);
 
       $('supervised-user-learn-more-done').onclick = function(event) {
-        Page.closeOverlay();
+        cr.ui.pageManager.PageManager.closeOverlay();
       };
     },
   };