Site Settings Desktop: Better support for chrome-extension scheme.

chrome/browser/resources/settings/site_settings/site_settings_behavior.js

Index: chrome/browser/resources/settings/site_settings/site_settings_behavior.js
diff --git a/chrome/browser/resources/settings/site_settings/site_settings_behavior.js b/chrome/browser/resources/settings/site_settings/site_settings_behavior.js
index f1a9dcbec66bfc34e58b7932d7a760f9d6e04ebd..3e7751147fa83cd1e904f7af8c9908b5c16b1461 100644
--- a/chrome/browser/resources/settings/site_settings/site_settings_behavior.js
+++ b/chrome/browser/resources/settings/site_settings/site_settings_behavior.js
@@ -381,6 +381,8 @@ var SiteSettingsBehaviorImpl = {
       return pattern.replace('http://', 'http://[*.]');
     else if (pattern.startsWith('https://'))
       return pattern.replace('https://', 'https://[*.]');
+    else if (pattern.startsWith('chrome-extension://'))
+      return pattern;  // No need for a wildcard for this.
     else
       return '[*.]' + pattern;
   },
@@ -481,7 +483,8 @@ var SiteSettingsBehaviorImpl = {
    */
   expandSiteException: function(exception) {
     var origin = exception.origin;
-    var originForDisplay = this.sanitizePort(this.toUrl(origin).origin);
+    var url = this.toUrl(origin);
+    var originForDisplay = url ? this.sanitizePort(url.origin) : origin;
 
     var embeddingOrigin = exception.embeddingOrigin;
     var embeddingOriginForDisplay = '';