Start ARC and sign in after Chrome OS login

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 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
 // check, so it is ok to access them directly.
 bool IsArcAvailable();
 
+// Returns true if ARC should always start within the primary user session
+// (opted in user or not), and other supported mode such as guest and Kiosk
+// mode.
+bool ShouldAlwaysStartArc();

[Luis Héctor Chávez, 2017/02/27 17:13:15]

same here, ShouldArcStartAlways

[victorhsieh, 2017/02/28 18:57:33]

Done.

+
+// Enables to always start ARC for testing, by appending the command line flag.
+void SetAlwaysStartArcForTesting();
+
 // Returns true if ARC is installed and running ARC kiosk apps on the current
 // device is officially supported.
 // It doesn't follow that ARC is available for user sessions and
 // IsArcAvailable() will return true, although the reverse should be.
 // This is used to distinguish special cases when ARC kiosk is available on
 // the device, but is not yet supported for regular user sessions.
 // In most cases, IsArcAvailable() check should be used instead of this.
 // Also not that this function may return true when ARC is not running in
 // Kiosk mode, it checks only ARC Kiosk availability.
 bool IsArcKioskAvailable();
@@ skipping 15 matching lines @@
 // 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_