Record the initial state of the Physical Web at startup

ios/chrome/browser/physical_web/create_physical_web_data_source.h

 // Copyright 2016 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 IOS_CHROME_BROWSER_PHYSICAL_WEB_CREATE_PHYSICAL_WEB_DATA_SOURCE_H_
 #define IOS_CHROME_BROWSER_PHYSICAL_WEB_CREATE_PHYSICAL_WEB_DATA_SOURCE_H_
 
 #include <memory>
 
 namespace physical_web {
 class PhysicalWebDataSource;
 }
+class PrefService;
 
 // Creates a new instance of IOSChromePhysicalWebDataSource. The returned object
 // is fully initialized and can be registered as global singleton.
 std::unique_ptr<physical_web::PhysicalWebDataSource>
-CreateIOSChromePhysicalWebDataSource();
+CreateIOSChromePhysicalWebDataSource(PrefService* prefService);
 
 #endif  // IOS_CHROME_BROWSER_PHYSICAL_WEB_CREATE_PHYSICAL_WEB_DATA_SOURCE_H_