Add a single site view page to view and modify content settings.

chrome/browser/resources/options/website_settings.js

Index: chrome/browser/resources/options/website_settings.js
diff --git a/chrome/browser/resources/options/website_settings.js b/chrome/browser/resources/options/website_settings.js
index c096d07891bb0af058d7fcf1f302cb188288c396..a89f488a661c5305753f25497e4c548e6a46de0e 100644
--- a/chrome/browser/resources/options/website_settings.js
+++ b/chrome/browser/resources/options/website_settings.js
@@ -123,6 +123,10 @@ cr.define('options', function() {
     WebsiteSettingsManager.getInstance().populateOrigins_(originDict);
   };
 
+  WebsiteSettingsManager.showEditPage = function(url) {
+    WebsiteSettingsEditor.getInstance().populatePage(url);
+  };
+
   // Export
   return {
     WebsiteSettingsManager: WebsiteSettingsManager