Don't show network config UI when networkingPrivate.startConenct fails

extensions/browser/api/networking_private/networking_private_chromeos.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_NETWORKING_PRIVATE_NETWORKING_PRIVATE_CHROMEOS_H_
 #define EXTENSIONS_BROWSER_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_CHROMEOS_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 99 matching lines @@
 
   // Populate ThirdPartyVPN.ProviderName with the provider name for third-party
   // VPNs. The provider name needs to be looked up from the list of extensions
   // which is not available to the chromeos/network module.
   void AppendThirdPartyProviderName(base::DictionaryValue* dictionary);
 
   // Sets the active proxy values in managed network configurations.
   void SetManagedActiveProxyValues(const std::string& guid,
                                    base::DictionaryValue* dictionary);
 
-  // Handles connection failures, possibly showing UI for configuration
-  // failures, then calls the appropriate callback.
-  void ConnectFailureCallback(
-      const std::string& guid,
-      const VoidCallback& success_callback,
-      const FailureCallback& failure_callback,
-      const std::string& error_name,
-      std::unique_ptr<base::DictionaryValue> error_data);
-
   content::BrowserContext* browser_context_;
   base::WeakPtrFactory<NetworkingPrivateChromeOS> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkingPrivateChromeOS);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_CHROMEOS_H_