arc: Consolidate IsArcAllowedForUser logic

components/arc/arc_util.h

Index: components/arc/arc_util.h
diff --git a/components/arc/arc_util.h b/components/arc/arc_util.h
index a9e69d36878ecbaae809ccdd1c2cb6a630a5eed6..2696b62d84844552b3b7aa33d20c23bb72a2710c 100644
--- a/components/arc/arc_util.h
+++ b/components/arc/arc_util.h
@@ -13,6 +13,10 @@ 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
@@ -58,6 +62,13 @@ void SetArcAvailableCommandLineForTesting(base::CommandLine* command_line);
 // 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();