Do not restart Chrome to apply user flags with stub session manager

chromeos/dbus/fake_session_manager_client.cc

Index: chromeos/dbus/fake_session_manager_client.cc
diff --git a/chromeos/dbus/fake_session_manager_client.cc b/chromeos/dbus/fake_session_manager_client.cc
index ba25113e3fd04f03628e9417afa36c223eb4cfce..efc63a110905389010a0bc5acd4aa6c6148a42c5 100644
--- a/chromeos/dbus/fake_session_manager_client.cc
+++ b/chromeos/dbus/fake_session_manager_client.cc
@@ -146,6 +146,10 @@ void FakeSessionManagerClient::StoreDeviceLocalAccountPolicy(
                                                 base::Bind(callback, true));
 }
 
+bool FakeSessionManagerClient::SupportsRestartToApplyUserFlags() const {
+  return false;
+}
+
 void FakeSessionManagerClient::SetFlagsForUser(
     const cryptohome::Identification& cryptohome_id,
     const std::vector<std::string>& flags) {}