Add CheckPortalList manager property to NetworkStateHandler

chromeos/network/shill_property_handler.h

Index: chromeos/network/shill_property_handler.h
diff --git a/chromeos/network/shill_property_handler.h b/chromeos/network/shill_property_handler.h
index eea30fd85ef2ed93d2933ab390e3fe54f553ce36..4ca119e805941211c215b91334687370180ea83e 100644
--- a/chromeos/network/shill_property_handler.h
+++ b/chromeos/network/shill_property_handler.h
@@ -71,6 +71,10 @@ class CHROMEOS_EXPORT ShillPropertyHandler
         const std::string& key,
         const base::Value& value) = 0;
 
+    // Called when the list of devices with portal check enabled changes.
+    virtual void CheckPortalListChanged(
+         const std::string& check_portal_list) = 0;
+
     // Called when one or more manager properties (e.g. a technology list)
     // changes.
     virtual void NotifyManagerPropertyChanged() = 0;
@@ -103,6 +107,9 @@ class CHROMEOS_EXPORT ShillPropertyHandler
       bool enabled,
       const network_handler::ErrorCallback& error_callback);
 
+  // Sets the list of devices on which portal check is enabled.
+  void SetCheckPortalList(const std::string& check_portal_list);
+
   // Requests an immediate network scan.
   void RequestScan() const;