Add SSID getter to WiFiService

components/wifi/wifi_service_mac.mm

Index: components/wifi/wifi_service_mac.mm
diff --git a/components/wifi/wifi_service_mac.mm b/components/wifi/wifi_service_mac.mm
index 890b22906fc478fd042d7ce50ca3cab3168f8589..11f1a5d30ec874ef6e979baf9fdbc2a30bdc9dbb 100644
--- a/components/wifi/wifi_service_mac.mm
+++ b/components/wifi/wifi_service_mac.mm
@@ -76,6 +76,8 @@ class WiFiServiceMac : public WiFiService {
 
   void RequestConnectedNetworkUpdate() override;
 
+  void GetConnectedNetworkGUID(std::string* guid, std::string* error) override;
+
  private:
   // Checks |ns_error| and if is not |nil|, then stores |error_name|
   // into |error|.
@@ -416,6 +418,12 @@ void WiFiServiceMac::RequestConnectedNetworkUpdate() {
   OnWlanObserverNotification();
 }
 
+void WiFiServiceMac::GetConnectedNetworkGUID(std::string* guid,
+                                             std::string* error) {
+  *guid = GUIDFromSSID([interface_ ssid]);
+  *error = "";
+}
+
 std::string WiFiServiceMac::GetNetworkConnectionState(
     const std::string& network_guid) const {
   if (network_guid != GUIDFromSSID([interface_ ssid]))