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

chromeos/dbus/session_manager_client.cc

Index: chromeos/dbus/session_manager_client.cc
diff --git a/chromeos/dbus/session_manager_client.cc b/chromeos/dbus/session_manager_client.cc
index 03aa6fd5dbf4eb862ce7ba6e7ccdacd8638ad141..940ababd49a938f0e554227e441f7c006cebde09 100644
--- a/chromeos/dbus/session_manager_client.cc
+++ b/chromeos/dbus/session_manager_client.cc
@@ -275,6 +275,8 @@ class SessionManagerClientImpl : public SessionManagerClient {
         callback);
   }
 
+  bool SupportsRestartToApplyUserFlags() const override { return true; }
+
   void SetFlagsForUser(const cryptohome::Identification& cryptohome_id,
                        const std::vector<std::string>& flags) override {
     dbus::MethodCall method_call(login_manager::kSessionManagerInterface,
@@ -940,6 +942,9 @@ class SessionManagerClientStubImpl : public SessionManagerClient {
     StorePolicyForUser(cryptohome::Identification::FromString(account_id),
                        policy_blob, callback);
   }
+
+  bool SupportsRestartToApplyUserFlags() const override { return false; }
+
   void SetFlagsForUser(const cryptohome::Identification& cryptohome_id,
                        const std::vector<std::string>& flags) override {}