[MD Extensions] Add support for URL navigation

chrome/browser/resources/md_extensions/options_dialog.js

Index: chrome/browser/resources/md_extensions/options_dialog.js
diff --git a/chrome/browser/resources/md_extensions/options_dialog.js b/chrome/browser/resources/md_extensions/options_dialog.js
index 9ed27d0089e781414e0c1ad7766d6aa0b629d039..3ea5059563f0110d82b294f1c20c2aa9c00d5014 100644
--- a/chrome/browser/resources/md_extensions/options_dialog.js
+++ b/chrome/browser/resources/md_extensions/options_dialog.js
@@ -21,6 +21,10 @@ cr.define('extensions', function() {
       data_: Object,
     },
 
+    get open() {
+      return this.$$('dialog').open;
+    },
+
     /** @param {chrome.developerPrivate.ExtensionInfo} data */
     show: function(data) {
       this.data_ = data;