Fix few minor easy unlock bugs

chrome/browser/signin/easy_unlock_screenlock_state_handler.h

Index: chrome/browser/signin/easy_unlock_screenlock_state_handler.h
diff --git a/chrome/browser/signin/easy_unlock_screenlock_state_handler.h b/chrome/browser/signin/easy_unlock_screenlock_state_handler.h
index e99c09ba493449f54e929826d64ab71fe3c3f560..452687b7e4e1d273ca013759354fc384c41f2c29 100644
--- a/chrome/browser/signin/easy_unlock_screenlock_state_handler.h
+++ b/chrome/browser/signin/easy_unlock_screenlock_state_handler.h
@@ -38,6 +38,9 @@ class EasyUnlockScreenlockStateHandler : public ScreenlockBridge::Observer {
     // A phone eligible to unlock the device is found, but it's not close enough
     // to be allowed to unlock the device.
     STATE_PHONE_NOT_NEARBY,
+    // An Easy Unlock enabled phone is found, but it is not allowed to unlock
+    // the device because it does not support reporting it's lock screen state.
+    STATE_PHONE_UNSUPPORTED,
     // The device can be unlocked using Easy Unlock.
     STATE_AUTHENTICATED
   };