MD Settings: add a semi-functional System page

chrome/browser/resources/settings/system_page/system_page.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.
 

[stevenjb, 2016/03/08 23:13:31]

While the @fileoverview comments are mostly rote, I think it's better to have
them for consistency. In some places they are helpful, and in this case I think
it would be nice to add a brief description of what 'System' refers to (e.g.
'settings related to the operating system').

[Dan Beam, 2016/03/09 02:31:31]

Done.

-/**
- * @fileoverview
- * 'settings-touchpad' is the settings subpage with touchpad settings.
- *
- * @group Chrome Settings Elements
- * @element settings-touchpad
- */
 Polymer({
-  is: 'settings-touchpad',
+  is: 'settings-system-page',
 
   properties: {
-    /** Preferences state. */
+    /** @type {settings.SystemPageDelegate} */
+    delegate: {
+      type: Object,
+    },
+
     prefs: {
       type: Object,
       notify: true,
     },
   },
+
+  /** @private */
+  onChangeProxySettingsTap_: function() {
+    this.delegate.changeProxySettings();
+  },
 });