Show parse errors in the UI when loading ONC files.

chrome/browser/chromeos/cros/network_library.h

 // Copyright (c) 2011 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 CHROME_BROWSER_CHROMEOS_CROS_NETWORK_LIBRARY_H_
 #define CHROME_BROWSER_CHROMEOS_CROS_NETWORK_LIBRARY_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 1771 matching lines @@
   // or vice versa or when user changes the ip config info.
   // If nothing is changed, this method does nothing.
   virtual void SetIPConfig(const NetworkIPConfig& ipconfig) = 0;
 
   // This will connect to a preferred network if the currently connected
   // network is not preferred. This should be called when the active profile
   // changes.
   virtual void SwitchToPreferredNetwork() = 0;
 
   // Load networks from an Open Network Configuration blob.
+  // If there was an error, this will return false and |error| will be set to
+  // the error message.
   virtual bool LoadOncNetworks(const std::string& onc_blob,
-                               const std::string& passcode) = 0;
+                               const std::string& passcode,
+                               std::string* error) = 0;
 
   // This sets the active network for the network type. Note: priority order
   // is unchanged (i.e. if a wifi network is set to active, but an ethernet
   // network is still active, active_network() will still return the ethernet
   // network). Other networks of the same type will become inactive.
   // Used for testing.
   virtual bool SetActiveNetwork(ConnectionType type,
                                 const std::string& service_path) = 0;
 
   // Factory function, creates a new instance and returns ownership.
   // For normal usage, access the singleton via CrosLibrary::Get().
   static NetworkLibrary* GetImpl(bool stub);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CROS_NETWORK_LIBRARY_H_