Add method GetKeyFromSystem to WiFiService on Windows and Mac.

components/wifi/fake_wifi_service.cc

 // 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.
 
 #include "components/wifi/wifi_service.h"
 
 #include "base/bind.h"
 #include "base/json/json_reader.h"
 #include "base/message_loop/message_loop.h"
 #include "components/onc/onc_constants.h"
@@ skipping 236 matching lines @@
       network_properties->connection_state =
           onc::connection_state::kNotConnected;
       SortNetworks();
       NotifyNetworkListChanged(networks_);
       NotifyNetworkChanged(network_guid);
     } else {
       *error = "not-found";
     }
   }
 
+  virtual void GetKeyFromSystem(const std::string& network_guid,
+                                bool get_plaintext_key,
+                                std::string* key_data,
+                                std::string* error) OVERRIDE {
+    *error = "not-found";
+  }
+
   virtual void SetEventObservers(
       scoped_refptr<base::MessageLoopProxy> message_loop_proxy,
       const NetworkGuidListCallback& networks_changed_observer,
       const NetworkGuidListCallback& network_list_changed_observer) OVERRIDE {
     message_loop_proxy_.swap(message_loop_proxy);
     networks_changed_observer_ = networks_changed_observer;
     network_list_changed_observer_ = network_list_changed_observer;
   }
 
   virtual void RequestConnectedNetworkUpdate() OVERRIDE { }
@@ skipping 44 matching lines @@
 
   NetworkList networks_;
   scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
   NetworkGuidListCallback networks_changed_observer_;
   NetworkGuidListCallback network_list_changed_observer_;
 };
 
 WiFiService* WiFiService::CreateForTest() { return new FakeWiFiService(); }
 
 }  // namespace wifi