MD Settings: Add route for the Import Data dialog at /importData.

chrome/browser/resources/settings/route.js

Index: chrome/browser/resources/settings/route.js
diff --git a/chrome/browser/resources/settings/route.js b/chrome/browser/resources/settings/route.js
index 7b5dc5734df7026cf8229a30a63e3049c3b85c76..082a46d3015bbb5cc8493b9a4b3b5967eeef5102 100644
--- a/chrome/browser/resources/settings/route.js
+++ b/chrome/browser/resources/settings/route.js
@@ -93,6 +93,7 @@ cr.define('settings', function() {
 
   // Navigable dialogs. These are the only non-section children of root pages.
   // These are disfavored. If we add anymore, we should add explicit support.
+  r.IMPORT_DATA = r.BASIC.createChild('/importData');
   r.SIGN_OUT = r.BASIC.createChild('/signOut');
   r.CLEAR_BROWSER_DATA = r.ADVANCED.createChild('/clearBrowserData');
   r.RESET_DIALOG = r.ADVANCED.createChild('/resetProfileSettings');