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 ca2273ecef8a1fe8f67e40053ee4081163392803..080ce82dd4d15fbb56368a5e9df8fb49e6d6563d 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -63,6 +63,10 @@ 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.
+// But there may be some exception that ARC will not run.

[Luis Héctor Chávez, 2017/03/01 22:25:39]

Is there a way to make this a bit more exhaustive? Like kArcAvailability.

[victorhsieh, 2017/03/02 00:28:12]

Done.

+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)