Provide warning message for setParameters

extensions/browser/api/vpn_provider/vpn_service.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_API_VPN_PROVIDER_VPN_SERVICE_H_
 #define EXTENSIONS_BROWSER_API_VPN_PROVIDER_VPN_SERVICE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 35 matching lines @@
 class NetworkStateHandler;
 class ShillThirdPartyVpnDriverClient;
 
 // The class manages the VPN configurations.
 class VpnService : public KeyedService,
                    public NetworkConfigurationObserver,
                    public NetworkStateHandlerObserver,
                    public extensions::ExtensionRegistryObserver {
  public:
   using SuccessCallback = base::Closure;
+  using StringCallback = base::Callback<void(const std::string& result)>;
   using FailureCallback =
       base::Callback<void(const std::string& error_name,
                           const std::string& error_message)>;
 
   VpnService(content::BrowserContext* browser_context,
              const std::string& userid_hash,
              extensions::ExtensionRegistry* extension_registry,
              extensions::EventRouter* event_router,
              ShillThirdPartyVpnDriverClient* shill_client,
              NetworkConfigurationHandler* network_configuration_handler,
@@ skipping 53 matching lines @@
   void DestroyConfiguration(const std::string& extension_id,
                             const std::string& configuration_id,
                             const SuccessCallback& success,
                             const FailureCallback& failure);
 
   // Set |parameters| for the active VPN configuration after verifying that it
   // belongs to the extension with id |extension_id|.
   // Calls |success| or |failure| based on the outcome.
   void SetParameters(const std::string& extension_id,
                      const base::DictionaryValue& parameters,
-                     const SuccessCallback& success,
+                     const StringCallback& success,
                      const FailureCallback& failure);
 
   // Sends an IP packet contained in |data| to the active VPN configuration
   // after verifying that it belongs to the extension with id |extension_id|.
   // Calls |success| or |failure| based on the outcome.
   void SendPacket(const std::string& extension_id,
                   const std::vector<char>& data,
                   const SuccessCallback& success,
                   const FailureCallback& failure);
 
@@ skipping 96 matching lines @@
   StringToConfigurationMap service_path_to_configuration_map_;
 
   base::WeakPtrFactory<VpnService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VpnService);
 };
 
 }  // namespace chromeos
 
 #endif  // EXTENSIONS_BROWSER_API_VPN_PROVIDER_VPN_SERVICE_H_