Add SSID getter to WiFiService

components/wifi/fake_wifi_service.cc

Index: components/wifi/fake_wifi_service.cc
diff --git a/components/wifi/fake_wifi_service.cc b/components/wifi/fake_wifi_service.cc
index 7c805b554d2e51b208226204be5a4e94b080cbbc..7246d9be1b23627ba01d4b4d62888a0a624aef38 100644
--- a/components/wifi/fake_wifi_service.cc
+++ b/components/wifi/fake_wifi_service.cc
@@ -189,6 +189,12 @@ void FakeWiFiService::SetEventObservers(
 void FakeWiFiService::RequestConnectedNetworkUpdate() {
 }
 
+void FakeWiFiService::GetConnectedNetworkSSID(std::string* ssid,
+                                              std::string* error) {
+  *ssid = "";
+  *error = "";
+}
+
 NetworkList::iterator FakeWiFiService::FindNetwork(
     const std::string& network_guid) {
   for (NetworkList::iterator it = networks_.begin(); it != networks_.end();