Flesh out the location-page class to make it more general.

chrome/browser/resources/settings/advanced_page/advanced_page.js

 // Copyright 2015 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
  * 'cr-settings-advanced-page' is the settings page containing the advanced
  * settings.
  *
  * Example:
@@ skipping 19 matching lines @@
       notify: true,
     },
 
     /**
      * The current active route.
      */
     currentRoute: {
       type: Object,
       notify: true,
     },
+
+    /**
+     * The content settings types supported in the UI.
+     */
+    contentSettingsTypes: {

[Dan Beam, 2015/10/10 01:27:39]

why is this here?  this should be in some constants file or in some base class

[Finnur, 2015/10/15 15:46:32]

Good point. Moved to constants.js.

Thanks for the link to the existing const file, it was much appreciated.

As you can see, I'm setting the .category property in the ready function now.
I'd like to use the const in .html instead, but I don't see an easy way of doing
that (a number of Internet searches on how to do that with Polymer came up
empty). If you know of a way, I'd be all ears.

+      readOnly: true,
+      type: Object,
+      value: {
+        COOKIES: 0,
+        IMAGES: 1,
+        JAVASCRIPT: 2,
+        POPUPS: 4,
+        GEOLOCATION: 5,
+        NOTIFICATION: 6,
+        FULLSCREEN: 8,
+        CAMERA: 13,
+        MIC: 14,
+      },
+    },
   },
 });