Adding pref to store the user-selected proximity threshold.

components/proximity_auth/proximity_auth_system.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_PROXIMITY_AUTH_PROXIMITY_AUTH_SYSTEM_H
 #define COMPONENTS_PROXIMITY_AUTH_PROXIMITY_AUTH_SYSTEM_H
 
 #include <memory>
 #include <vector>
 
@@ skipping 95 matching lines @@
   // Lists of remote devices, keyed by user account id.
   std::map<AccountId, cryptauth::RemoteDeviceList> remote_devices_map_;
 
   // Delegate for Chrome dependent functionality.
   ProximityAuthClient* proximity_auth_client_;
 
   // Responsible for the life cycle of connecting and authenticating to
   // the RemoteDevice of the currently focused user.
   std::unique_ptr<RemoteDeviceLifeCycle> remote_device_life_cycle_;
 
-  // Handles the interaction with the lock screen UI.
-  std::unique_ptr<UnlockManager> unlock_manager_;
-
   // Used to get the current timestamp.
   std::unique_ptr<base::Clock> clock_;
 
   // Fetches EasyUnlock preferences.
   std::unique_ptr<ProximityAuthPrefManager> pref_manager_;
 
+  // Handles the interaction with the lock screen UI.
+  std::unique_ptr<UnlockManager> unlock_manager_;
+
   // True if the system is suspended.
   bool suspended_;
 
   // True if the system is started_.
   bool started_;
 
   base::WeakPtrFactory<ProximityAuthSystem> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProximityAuthSystem);
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_PROXIMITY_AUTH_SYSTEM_H