Update markup for import data markup to work well with uber page.

chrome/browser/resources/options2/browser_options.js

Index: chrome/browser/resources/options2/browser_options.js
===================================================================
--- chrome/browser/resources/options2/browser_options.js	(revision 126715)
+++ chrome/browser/resources/options2/browser_options.js	(working copy)
@@ -229,11 +229,7 @@
         };
       } else {
         $('import-data').onclick = function(event) {
-          // Make sure that any previous import success message is hidden, and
-          // we're showing the UI to import further data.
-          $('import-data-configure').hidden = false;
-          $('import-data-success').hidden = true;
-          OptionsPage.navigateToPage('importData');
+          ImportDataOverlay.show();
           chrome.send('coreOptionsUserMetricsAction', ['Import_ShowDlg']);
         };