Pass Physical Web metadata through a struct

components/physical_web/data_source/fake_physical_web_data_source.cc

Index: components/physical_web/data_source/fake_physical_web_data_source.cc
diff --git a/components/physical_web/data_source/fake_physical_web_data_source.cc b/components/physical_web/data_source/fake_physical_web_data_source.cc
index 2419a6d02058eb527661372877b4c83c96ac565d..d5ebbb11f662b6ad694435ad2fcf60d1eef1afbc 100644
--- a/components/physical_web/data_source/fake_physical_web_data_source.cc
+++ b/components/physical_web/data_source/fake_physical_web_data_source.cc
@@ -73,6 +73,10 @@ std::unique_ptr<base::ListValue> FakePhysicalWebDataSource::GetMetadata() {
   return metadata_->CreateDeepCopy();
 }
 
+std::unique_ptr<MetadataList> FakePhysicalWebDataSource::GetMetadataList() {
+  return base::MakeUnique<MetadataList>(*metadata_list_.get());
+}
+
 bool FakePhysicalWebDataSource::HasUnresolvedDiscoveries() {
   return false;
 }
@@ -92,6 +96,11 @@ void FakePhysicalWebDataSource::SetMetadata(
   metadata_ = std::move(metadata);
 }
 
+void FakePhysicalWebDataSource::SetMetadataList(
+    std::unique_ptr<MetadataList> metadata_list) {
+  metadata_list_ = std::move(metadata_list);
+}
+
 void FakePhysicalWebDataSource::NotifyOnFound(const GURL& url) {
   for (PhysicalWebListener& observer : observer_list_)
     observer.OnFound(url);