Add module for counting date-last-roll-call and persisting those counts

components/update_client/test_configurator.cc

Index: components/update_client/test_configurator.cc
diff --git a/components/update_client/test_configurator.cc b/components/update_client/test_configurator.cc
index 6ba5392befb2f185f0f93824c5fd44a9d31500af..233f9a19c1bd2e16cbc36ea0afc0c1ab9119b018 100644
--- a/components/update_client/test_configurator.cc
+++ b/components/update_client/test_configurator.cc
@@ -153,4 +153,9 @@ TestConfigurator::GetSequencedTaskRunner() const {
   return worker_task_runner_;
 }
 
+base::FilePath TestConfigurator::GetMetadataPath() const {
+  // Returning an empty path will result in an in-memory cache only.
+  return base::FilePath();
+}
+
 }  // namespace update_client