Add method GetKeyFromSystem to WiFiService on Windows and Mac.

components/wifi/wifi_service.h

 // Copyright 2013 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_UTILITY_WIFI_WIFI_SERVICE_H_
 #define CHROME_UTILITY_WIFI_WIFI_SERVICE_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 82 matching lines @@
   // Start connect to network identified by |network_guid|. Populates |error|
   // on failure.
   virtual void StartConnect(const std::string& network_guid,
                             std::string* error) = 0;
 
   // Start disconnect from network identified by |network_guid|. Populates
   // |error| on failure.
   virtual void StartDisconnect(const std::string& network_guid,
                                std::string* error) = 0;
 
+  // Get WiFi Key for network identified by |network_guid| from the
+  // system (if it has one) and store it in |key_data|. User privilege elevation
+  // may be required, and function will fail if user privileges are not
+  // sufficient. Populates |error| on failure.
+  virtual void GetKeyFromSystem(const std::string& network_guid,
+                                std::string* key_data,
+                                std::string* error) = 0;
+
   // Set observers to run when |NetworksChanged| and |NetworksListChanged|
   // events needs to be sent. Notifications are posted on |message_loop_proxy|.
   virtual void SetEventObservers(
       scoped_refptr<base::MessageLoopProxy> message_loop_proxy,
       const NetworkGuidListCallback& networks_changed_observer,
       const NetworkGuidListCallback& network_list_changed_observer) = 0;
 
   // Request update of Connected Network information. Send |NetworksChanged|
   // event on completion.
   virtual void RequestConnectedNetworkUpdate() = 0;
@@ skipping 45 matching lines @@
 
   typedef std::list<NetworkProperties> NetworkList;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WiFiService);
 };
 
 }  // namespace wifi
 
 #endif  // CHROME_UTILITY_WIFI_WIFI_SERVICE_H_