Start ARC and sign in after Chrome OS login

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index 064f163fc7f6e34299f613f4f62e64398d38187d..17e1945b1962486165f6be89484cbd95fcbf96bc 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -57,6 +57,10 @@ const char kAppAutoLaunched[] = "app-auto-launched";
 // Path for app's OEM manifest file.
 const char kAppOemManifestFile[] = "app-mode-oem-manifest";
 
+// Always starts ARC after login screen without Play Store in almost all cases.
+// Secondary profile is an exception where ARC will not start.
+const char kArcAlwaysStart[] = "arc-always-start";
+
 // Signals ARC support status on this device. This can take one of the
 // following three values.
 // - none: ARC is not installed on this device. (default)