[EasyUnlock] Force user to enter their password after 20 hours.

chrome/browser/signin/easy_unlock_metrics.h

Index: chrome/browser/signin/easy_unlock_metrics.h
diff --git a/chrome/browser/signin/easy_unlock_metrics.h b/chrome/browser/signin/easy_unlock_metrics.h
index bd2931681872b052a682743931653b7c1b74e70a..309ec26a7b117e7676023bd86e72646cb3549951 100644
--- a/chrome/browser/signin/easy_unlock_metrics.h
+++ b/chrome/browser/signin/easy_unlock_metrics.h
@@ -62,6 +62,10 @@ enum EasyUnlockAuthEvent {
   // the Chromebook.
   PASSWORD_ENTRY_PHONE_LOCKED_AND_RSSI_TOO_LOW = 19,
 
+  // Password entry was forced due to the reauth policy (e.g. the user must type
+  // their password every 20 hours).
+  PASSWORD_ENTRY_FORCED_REAUTH = 20,
+
   EASY_UNLOCK_AUTH_EVENT_COUNT  // Must be the last entry.
 };