NetworkHandler: Add ui_proxy_config_service

chrome/browser/chromeos/net/network_pref_state_observer.h

+// 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_NET_NETWORK_PREF_STATE_OBSERVER_H_
+#define CHROME_BROWSER_CHROMEOS_NET_NETWORK_PREF_STATE_OBSERVER_H_
+
+#include "base/macros.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+class Profile;
+
+namespace chromeos {
+
+// Class to update NetworkHandler when the PrefService state changes. The
+// implementation currently relies on g_browser_process since it holds the
+// default PrefService.
+class NetworkPrefStateObserver : public content::NotificationObserver {
+ public:
+  NetworkPrefStateObserver();
+  ~NetworkPrefStateObserver() override;
+
+  // content::NotificationObserver
+  void Observe(int type,
+               const content::NotificationSource& source,
+               const content::NotificationDetails& details) override;
+
+ private:
+  void InitializeNetworkPrefServices(Profile* profile);
+
+  content::NotificationRegistrar notification_registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(NetworkPrefStateObserver);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_NET_NETWORK_PREF_STATE_OBSERVER_H_