Move GetVisibleNetworks network type filtering to WiFiService interface.

chrome/utility/networking_private_handler.cc

Index: chrome/utility/networking_private_handler.cc
diff --git a/chrome/utility/networking_private_handler.cc b/chrome/utility/networking_private_handler.cc
index 13a8254fddcc2362eb223ecdbca19a3ef1174128..0d77a9ced9ea9da1a90ad9f15eea62e9c98ad391 100644
--- a/chrome/utility/networking_private_handler.cc
+++ b/chrome/utility/networking_private_handler.cc
@@ -151,6 +151,7 @@ void NetworkingPrivateHandler::WiFiStartDisconnectSucceeded(
 
 void NetworkingPrivateHandler::OnRequestNetworkScan() {
   wifi_service_->GetVisibleNetworks(
+      std::string(),
       base::Bind(&NetworkingPrivateHandler::WiFiNetworkScanSucceeded,
                  base::Unretained(this)),
       base::Bind(
@@ -170,8 +171,11 @@ void NetworkingPrivateHandler::WiFiNetworkScanSucceeded(
   Send(new NetworkingPrivateMsg_NetworkListChanged_Event(list));
 }
 
-void NetworkingPrivateHandler::OnGetVisibleNetworks(int message_id) {
+void NetworkingPrivateHandler::OnGetVisibleNetworks(
+    int message_id,
+    const std::string& network_type) {
   wifi_service_->GetVisibleNetworks(
+      network_type,
       base::Bind(&NetworkingPrivateHandler::WiFiGetVisibleNetworksSucceeded,
                  base::Unretained(this),
                  message_id),