Use NetworkConnectionObserver to trigger connect failure notifications

ui/chromeos/network/network_connect.h

 // Copyright (c) 2012 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 UI_CHROMEOS_NETWORK_NETWORK_CONNECT_H
 #define UI_CHROMEOS_NETWORK_NETWORK_CONNECT_H
 
 #include <string>
 
 #include "base/strings/string16.h"
@@ skipping 78 matching lines @@
   // The profile used is determined by |shared|.
   virtual void CreateConfigurationAndConnect(base::DictionaryValue* properties,
                                              bool shared) = 0;
 
   // Requests a new network configuration to be created from a dictionary of
   // Shill properties. The profile used is determined by |shared|.
   virtual void CreateConfiguration(base::DictionaryValue* properties,
                                    bool shared) = 0;
 
   // Returns the localized string for shill error string |error|.
-  virtual base::string16 GetErrorString(const std::string& error,
-                                        const std::string& service_path) = 0;
+  virtual base::string16 GetShillErrorString(
+      const std::string& error,
+      const std::string& service_path) = 0;
 
   // Shows the settings for the network specified by |service_path|. If empty,
   // or no matching network exists, shows the general internet settings page.
   virtual void ShowNetworkSettings(const std::string& service_path) = 0;
 
  protected:
   NetworkConnect();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NetworkConnect);
 };
 
 }  // ui
 
 #endif  // UI_CHROMEOS_NETWORK_NETWORK_CONNECT_H