[EasyUnlock] Make login work if command line flag is enabled.

components/proximity_auth/proximity_auth_system.h

Index: components/proximity_auth/proximity_auth_system.h
diff --git a/components/proximity_auth/proximity_auth_system.h b/components/proximity_auth/proximity_auth_system.h
index 1f98ae5d34fdd40dc5e44dccb924420ff2066165..980f7fc0766c076b079b2774ef3f2547244e1c14 100644
--- a/components/proximity_auth/proximity_auth_system.h
+++ b/components/proximity_auth/proximity_auth_system.h
@@ -100,6 +100,9 @@ class ProximityAuthSystem : public RemoteDeviceLifeCycle::Observer,
   // rather than EasyUnlock.
   bool ShouldForcePassword();
 
+  // The type of the screenlock (i.e. login or unlock).
+  ScreenlockType screenlock_type_;
+
   // Lists of remote devices, keyed by user account id.
   std::map<AccountId, cryptauth::RemoteDeviceList> remote_devices_map_;