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

chromeos/dbus/session_manager_client.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 CHROMEOS_DBUS_SESSION_MANAGER_CLIENT_H_
 #define CHROMEOS_DBUS_SESSION_MANAGER_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 180 matching lines @@
       const std::string& policy_blob,
       const StorePolicyCallback& callback) = 0;
 
   // Sends a request to store a policy blob for the specified device-local
   // account. The result of the operation is reported through |callback|.
   virtual void StoreDeviceLocalAccountPolicy(
       const std::string& account_id,
       const std::string& policy_blob,
       const StorePolicyCallback& callback) = 0;
 
+  // Returns whether session manager can be used to restart Chrome in order to
+  // apply per-user session flags.
+  virtual bool SupportsRestartToApplyUserFlags() const = 0;
+
   // Sets the flags to be applied next time by the session manager when Chrome
   // is restarted inside an already started session for a particular user.
   virtual void SetFlagsForUser(const cryptohome::Identification& cryptohome_id,
                                const std::vector<std::string>& flags) = 0;
 
   using StateKeysCallback =
       base::Callback<void(const std::vector<std::string>& state_keys)>;
 
   // Get the currently valid server-backed state keys for the device.
   // Server-backed state keys are opaque, device-unique, time-dependent,
@@ skipping 85 matching lines @@
   // Create() should be used instead.
   SessionManagerClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SessionManagerClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_SESSION_MANAGER_CLIENT_H_