Adding pref to store the user-selected proximity threshold.

components/proximity_auth/proximity_auth_system.cc

Index: components/proximity_auth/proximity_auth_system.cc
diff --git a/components/proximity_auth/proximity_auth_system.cc b/components/proximity_auth/proximity_auth_system.cc
index 86af97534d0ea0ecf4ff910853a9d89416a7cd40..f425e73cbc9bc0f7e18673013e36947e6797bd01 100644
--- a/components/proximity_auth/proximity_auth_system.cc
+++ b/components/proximity_auth/proximity_auth_system.cc
@@ -29,11 +29,12 @@ ProximityAuthSystem::ProximityAuthSystem(
     ProximityAuthClient* proximity_auth_client)
     : screenlock_type_(screenlock_type),
       proximity_auth_client_(proximity_auth_client),
-      unlock_manager_(
-          new UnlockManagerImpl(screenlock_type, proximity_auth_client)),
       clock_(new base::DefaultClock()),
       pref_manager_(new ProximityAuthPrefManager(
           proximity_auth_client->GetPrefService())),
+      unlock_manager_(new UnlockManagerImpl(screenlock_type,
+                                            proximity_auth_client_,
+                                            pref_manager_.get())),
       suspended_(false),
       started_(false),
       weak_ptr_factory_(this) {}
@@ -46,9 +47,9 @@ ProximityAuthSystem::ProximityAuthSystem(
     std::unique_ptr<ProximityAuthPrefManager> pref_manager)
     : screenlock_type_(screenlock_type),
       proximity_auth_client_(proximity_auth_client),
-      unlock_manager_(std::move(unlock_manager)),
       clock_(std::move(clock)),
       pref_manager_(std::move(pref_manager)),
+      unlock_manager_(std::move(unlock_manager)),
       suspended_(false),
       started_(false),
       weak_ptr_factory_(this) {}