[MD settings] allow site exceptions without pattern wildcard

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview
  * 'add-site-dialog' provides a dialog to add exceptions for a given Content
  * Settings category.
  */
 Polymer({
@@ skipping 68 matching lines @@
   },
 
   /**
    * The tap handler for the Add [Site] button (adds the pattern and closes
    * the dialog).
    * @private
    */
   onSubmit_: function() {
     if (this.$.add.disabled)
       return;  // Can happen when Enter is pressed.
-    var pattern = this.addPatternWildcard(this.site_);
     this.browserProxy.setCategoryPermissionForOrigin(
-        pattern, pattern, this.category, this.contentSetting,
+        this.site_, this.site_, this.category, this.contentSetting,
         this.$.incognito.checked);
     this.$.dialog.close();
   },
 });