cros: Add flag to enable pin on sign-in screen.

chrome/browser/flag_descriptions.cc

Index: chrome/browser/flag_descriptions.cc
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 0421950a78030c40f8466a94982a4a26090ba4f5..3f4dae919c694e043045f388ac7c7a9a63862b43 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -2878,6 +2878,12 @@ const char kQuickUnlockPinDescription[] =
     "Enabling PIN quick unlock allows you to use a PIN to unlock your "
     "Chromebook on the lock screen after you have signed into your device.";
 
+const char kQuickUnlockPinSignin[] = "Enable PIN when logging in.";
+
+const char kQuickUnlockPinSigninDescription[] =
+    "Enabling PIN allows you to use a PIN to sign in and unlock your "
+    "Chromebook. After changing this flag PIN needs to be set up again.";

[achuithb, 2017/04/16 23:50:36]

And you really want to just use Chromebook here?

[jdufault, 2017/04/17 20:36:08]

Done.

+
 const char kQuickUnlockFingerprint[] = "Quick Unlock (Fingerprint)";
 
 const char kQuickUnlockFingerprintDescription[] =