arc: Start ARC for Public Session users.

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 7558ac3944d517a869b96bfb36a49f7b1d2dee75..71eb4cc3b9300a9019810a106c439a2854b25931 100644
--- a/components/arc/arc_util.h
+++ b/components/arc/arc_util.h
@@ -78,6 +78,11 @@ void SetArcAvailableCommandLineForTesting(base::CommandLine* command_line);
 // should also return true in that case.
 bool IsArcKioskMode();
 
+// Returns true if current user is a public session.
+// In that case ARC should also be started if available, using the same
+// authentication flow as ARC Kiosk mode.
+bool IsPublicSessionMode();

[Luis Héctor Chávez, 2017/08/28 18:33:28]

So far all the code is doing are variations of (IsArcKioskMode() ||
IsPublicSessionMode()) (probably negated). Can you combine both into a single
concept to avoid accidentally only allowing one? If there are places where you
just want one, can you explicitly call them out?

[Sergey Poromov, 2017/08/28 18:47:24]

Done.

+
 // 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