[Chrome OS] Attempt offline and online login simultaneously

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index d6ff1d6c082c0c0365c5a55c0c85f7c9f10be628..a74b29be85841cca9f68f854f0540a7a497f37c5 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1151,6 +1151,9 @@ const char kLoginUser[]                     = "login-user";
 // Specifies a password to be used to login (along with login-user).
 const char kLoginPassword[]                 = "login-password";
 
+// Attempts to perform Chrome OS offline and online login in parallel.
+const char kParallelAuth[]                  = "parallel-auth";
+
 // Use the frame layout used in chromeos.
 const char kChromeosFrame[]                 = "chromeos-frame";