Associate a scan mode with Physical Web listeners

components/physical_web/data_source/fake_physical_web_data_source.cc

 // 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.
 
 #include "components/physical_web/data_source/fake_physical_web_data_source.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "components/physical_web/data_source/physical_web_listener.h"
 #include "url/gurl.h"
 
@@ skipping 57 matching lines @@
 
 std::unique_ptr<MetadataList> FakePhysicalWebDataSource::GetMetadataList() {
   return base::MakeUnique<MetadataList>(*metadata_list_.get());
 }
 
 bool FakePhysicalWebDataSource::HasUnresolvedDiscoveries() {
   return false;
 }
 
 void FakePhysicalWebDataSource::RegisterListener(
-    PhysicalWebListener* physical_web_listener) {
+    PhysicalWebListener* physical_web_listener, ScanMode scan_mode) {
   observer_list_.AddObserver(physical_web_listener);
 }
 
 void FakePhysicalWebDataSource::UnregisterListener(
     PhysicalWebListener* physical_web_listener) {
   observer_list_.RemoveObserver(physical_web_listener);
 }
 
 void FakePhysicalWebDataSource::SetMetadataList(
     std::unique_ptr<MetadataList> metadata_list) {
@@ skipping 11 matching lines @@
 }
 
 void FakePhysicalWebDataSource::NotifyOnDistanceChanged(
     const GURL& url,
     double distance_estimate) {
   for (PhysicalWebListener& observer : observer_list_)
     observer.OnDistanceChanged(url, distance_estimate);
 }
 
 }  // namespace physical_web