add a new, blank version of content settings so that a new UI may be prototyped

chrome/browser/resources/options/content_settings.js

Index: chrome/browser/resources/options/content_settings.js
diff --git a/chrome/browser/resources/options/content_settings.js b/chrome/browser/resources/options/content_settings.js
index 4605de2740e513056df61c6deb71c2f6214fef3a..a17a18b75eee95ca98c3060b3d5705a0ad8177c6 100644
--- a/chrome/browser/resources/options/content_settings.js
+++ b/chrome/browser/resources/options/content_settings.js
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+if (!loadTimeData.getBoolean('newContentSettings')) {
+
 cr.define('options', function() {
   /** @const */ var OptionsPage = options.OptionsPage;
 
@@ -174,3 +176,5 @@ cr.define('options', function() {
   };
 
 });
+
+}