Pass Physical Web metadata through a struct

components/physical_web/data_source/physical_web_data_source_impl_unittest.cc

Index: components/physical_web/data_source/physical_web_data_source_impl_unittest.cc
diff --git a/components/physical_web/data_source/physical_web_data_source_impl_unittest.cc b/components/physical_web/data_source/physical_web_data_source_impl_unittest.cc
index 87d8da8a2f6e81f2f1d3f3f101c990eabad38f0d..ddf30bc4542c00d20aaca6c8343bbfd8cbb4378e 100644
--- a/components/physical_web/data_source/physical_web_data_source_impl_unittest.cc
+++ b/components/physical_web/data_source/physical_web_data_source_impl_unittest.cc
@@ -23,6 +23,7 @@ class TestPhysicalWebDataSource : public PhysicalWebDataSourceImpl {
   void StartDiscovery(bool network_request_enabled) override;
   void StopDiscovery() override;
   std::unique_ptr<base::ListValue> GetMetadata() override;
+  std::unique_ptr<MetadataList> GetMetadataList() override;
   bool HasUnresolvedDiscoveries() override;
 };
 void TestPhysicalWebDataSource::StartDiscovery(bool network_request_enabled) {}
@@ -33,6 +34,10 @@ std::unique_ptr<base::ListValue> TestPhysicalWebDataSource::GetMetadata() {
   return NULL;
 }
 
+std::unique_ptr<MetadataList> TestPhysicalWebDataSource::GetMetadataList() {
+  return NULL;
+}
+
 bool TestPhysicalWebDataSource::HasUnresolvedDiscoveries() {
   return false;
 }