Update chrome.settingsPrivate to support CrOS-only settings.

chrome/browser/extensions/api/settings_private/settings_private_event_router.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_SETTINGS_PRIVATE_SETTINGS_PRIVATE_EVENT_ROUTER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SETTINGS_PRIVATE_SETTINGS_PRIVATE_EVENT_ROUTER_H_
 
 #include "base/prefs/pref_change_registrar.h"
+#include "chrome/browser/chromeos/settings/cros_settings.h"
+#include "chrome/browser/extensions/api/settings_private/prefs_util.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "extensions/browser/event_router.h"
 
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 
 class SettingsPrivateDelegate;
 
 // This is an event router that will observe listeners to pref changes on the
 // appropriate pref service(s) and notify listeners on the JavaScript
 // settingsPrivate API.
 class SettingsPrivateEventRouter : public KeyedService,
                                    public EventRouter::Observer {
  public:
   static SettingsPrivateEventRouter* Create(
       content::BrowserContext* browser_context);
   ~SettingsPrivateEventRouter() override;
 
  protected:
-  SettingsPrivateEventRouter() {}
   explicit SettingsPrivateEventRouter(content::BrowserContext* context);
 
   // KeyedService overrides:
   void Shutdown() override;
 
   // EventRouter::Observer overrides:
   void OnListenerAdded(const EventListenerInfo& details) override;
   void OnListenerRemoved(const EventListenerInfo& details) override;
 
   // This registrar monitors for user prefs changes.
   PrefChangeRegistrar user_prefs_registrar_;
 
   // This registrar monitors for local state changes.
   PrefChangeRegistrar local_state_registrar_;
 
  private:
   // Decide if we should listen for pref changes or not. If there are any
   // JavaScript listeners registered for the onPrefsChanged event, then we
   // want to register for change notification from the PrefChangeRegistrar.
   // Otherwise, we want to unregister and not be listening for pref changes.
   void StartOrStopListeningForPrefsChanges();
 
-  void OnPreferenceChanged(PrefService* service, const std::string& pref_name);
+  void OnPreferenceChanged(const std::string& pref_name);
 
   PrefChangeRegistrar* FindRegistrarForPref(const std::string& pref_name);
 
+  typedef std::map<std::string,
+                   linked_ptr<chromeos::CrosSettings::ObserverSubscription>>
+      SubscriptionMap;
+  SubscriptionMap cros_settings_subscription_map_;
+
   content::BrowserContext* context_;
   bool listening_;
 
+  scoped_ptr<PrefsUtil> prefs_util_;
+
   DISALLOW_COPY_AND_ASSIGN(SettingsPrivateEventRouter);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_SETTINGS_PRIVATE_SETTINGS_PRIVATE_EVENT_ROUTER_H_