arc: Consolidate IsArcAllowedForUser logic

components/arc/arc_util.h

 // Copyright 2017 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 COMPONENTS_ARC_ARC_UTIL_H_
 #define COMPONENTS_ARC_ARC_UTIL_H_
 
 // This file contains utility to see ARC functionality status controlled by
 // outside of ARC, e.g. CommandLine flag, attribute of global data/state,
 // users' preferences, and FeatureList.
 
 namespace base {
 class CommandLine;
 }  // namespace base
 
+namespace user_manager {
+class User;
+}

[hidehiko, 2017/05/17 02:09:45]

nit: // namespace user_manager
for consistency.

[xiyuan, 2017/05/17 21:36:14]

Done.

+
 namespace arc {
 
 // Returns true if ARC is installed and the current device is officially
 // supported to run ARC.
 // Note that, to run ARC practically, it is necessary to meet more conditions,
 // e.g., ARC supports only on Primary User Profile. To see if ARC can actually
 // run for the profile etc., arc::ArcSessionManager::IsAllowedForProfile() is
 // the function for that purpose. Please see also its comment, too.
 // Also note that, ARC singleton classes (e.g. ArcSessionManager,
 // ArcServiceManager, ArcServiceLauncher) are instantiated regardless of this
@@ skipping 25 matching lines @@
 // base::CommandLine::ForCurrentProcess().
 // |command_line| must not be nullptr.
 void SetArcAvailableCommandLineForTesting(base::CommandLine* command_line);
 
 // Returns true if ARC should run under Kiosk mode for the current profile.
 // As it can return true only when user is already initialized, it implies
 // that ARC availability was checked before and IsArcKioskAvailable()
 // should also return true in that case.
 bool IsArcKioskMode();
 
+// Returns true if ARC is allowed for the given user. Note this should not be
+// used as a signal of whether ARC is allowed alone because it only considers
+// user meta data. e.g. a user could be allowed for ARC but if the user signs in
+// as a secondary user or signs in to create a supervised user, ARC should be
+// disabled for such cases.
+bool IsArcAllowedForUser(const user_manager::User* user);
+
 // Returns true if it is allowed to use ARC with Active Directory managed
 // devices.
 bool IsArcAllowedForActiveDirectoryUsers();
 
 // Checks if opt-in verification was disabled by switch in command line.
 // In most cases, it is disabled for testing purpose.
 bool IsArcOptInVerificationDisabled();
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_ARC_UTIL_H_