Move GetVisibleNetworks network type filtering to WiFiService interface.

components/wifi/wifi_service.h

Index: components/wifi/wifi_service.h
diff --git a/components/wifi/wifi_service.h b/components/wifi/wifi_service.h
index a81d1e3a22883ffe4001c0341d2d8752ebb68072..49f8af454df351dee1f53908aa57c652a63b34c1 100644
--- a/components/wifi/wifi_service.h
+++ b/components/wifi/wifi_service.h
@@ -54,8 +54,10 @@ class WIFI_EXPORT WiFiService {
                              scoped_ptr<base::DictionaryValue> properties,
                              std::string* error) = 0;
 
-  // Get list of visible networks. Populates |network_list| on success.
-  virtual void GetVisibleNetworks(ListValue* network_list) = 0;
+  // Get list of visible networks of |network_type| (one of onc::network_type).
+  // Populates |network_list| on success.
+  virtual void GetVisibleNetworks(const std::string& network_type,
+                                  ListValue* network_list) = 0;
 
   // Request network scan. Send |NetworkListChanged| event on completion.
   virtual void RequestNetworkScan() = 0;