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

chrome/browser/chromeos/settings/device_settings_test_helper.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_SETTINGS_TEST_HELPER_H_
 #define CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_SETTINGS_TEST_HELPER_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 99 matching lines @@
       const RetrievePolicyCallback& callback) override;
   void StoreDevicePolicy(const std::string& policy_blob,
                          const StorePolicyCallback& callback) override;
   void StorePolicyForUser(const cryptohome::Identification& cryptohome_id,
                           const std::string& policy_blob,
                           const StorePolicyCallback& callback) override;
   void StoreDeviceLocalAccountPolicy(
       const std::string& account_id,
       const std::string& policy_blob,
       const StorePolicyCallback& callback) override;
+  bool SupportsRestartToApplyUserFlags() const override;
   void SetFlagsForUser(const cryptohome::Identification& cryptohome_id,
                        const std::vector<std::string>& flags) override;
   void GetServerBackedStateKeys(const StateKeysCallback& callback) override;
 
   void CheckArcAvailability(const ArcCallback& callback) override;
   void StartArcInstance(const cryptohome::Identification& cryptohome_id,
                         bool disable_boot_completed_broadcast,
                         const StartArcInstanceCallback& callback) override;
   void StopArcInstance(const ArcCallback& callback) override;
   void PrioritizeArcInstance(const ArcCallback& callback) override;
@@ skipping 76 matching lines @@
 
   std::unique_ptr<DBusThreadManagerSetter> dbus_setter_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DeviceSettingsTestBase);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SETTINGS_DEVICE_SETTINGS_TEST_HELPER_H_