Add WiFi SSID getter to NetworkChangeNotifier.

components/web_resource/resource_request_allowed_notifier_unittest.cc

Index: components/web_resource/resource_request_allowed_notifier_unittest.cc
diff --git a/components/web_resource/resource_request_allowed_notifier_unittest.cc b/components/web_resource/resource_request_allowed_notifier_unittest.cc
index 27905628ccb686bee15ae95a2087cadde70984a2..98f5a2d9afb2a9204df629cf5649139a3fe50837 100644
--- a/components/web_resource/resource_request_allowed_notifier_unittest.cc
+++ b/components/web_resource/resource_request_allowed_notifier_unittest.cc
@@ -31,6 +31,9 @@ class TestNetworkChangeNotifier : public net::NetworkChangeNotifier {
   ConnectionType GetCurrentConnectionType() const override {
     return connection_type_to_return_;
   }
+  std::string GetCurrentWiFiSSID() const override {
+    return "";
+  }
 
   // The currently simulated network connection type. If this is set to
   // CONNECTION_NONE, then NetworkChangeNotifier::IsOffline will return true.