Update chrome.settingsPrivate to support CrOS-only settings.

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

Index: chrome/browser/extensions/api/settings_private/settings_private_event_router.h
diff --git a/chrome/browser/extensions/api/settings_private/settings_private_event_router.h b/chrome/browser/extensions/api/settings_private/settings_private_event_router.h
index db8ea9c9ec922e67b174dcce87580bfb009db261..5b07a60020b9f5d35aa2b2cc1ecd87c8d5ff0cfa 100644
--- a/chrome/browser/extensions/api/settings_private/settings_private_event_router.h
+++ b/chrome/browser/extensions/api/settings_private/settings_private_event_router.h
@@ -6,6 +6,8 @@
 #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"
 
@@ -28,7 +30,6 @@ class SettingsPrivateEventRouter : public KeyedService,
   ~SettingsPrivateEventRouter() override;
 
  protected:
-  SettingsPrivateEventRouter() {}
   explicit SettingsPrivateEventRouter(content::BrowserContext* context);
 
   // KeyedService overrides:
@@ -51,13 +52,20 @@ class SettingsPrivateEventRouter : public KeyedService,
   // 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);
 };