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

components/update_client/update_engine.cc

Index: components/update_client/update_engine.cc
diff --git a/components/update_client/update_engine.cc b/components/update_client/update_engine.cc
index 20f9a6acf1e28f30be484fe7548aff4527dc37f9..15a15b421737df7e720472eb932aa092e8470a91 100644
--- a/components/update_client/update_engine.cc
+++ b/components/update_client/update_engine.cc
@@ -13,6 +13,7 @@
 #include "components/update_client/action_update_check.h"
 #include "components/update_client/configurator.h"
 #include "components/update_client/crx_update_item.h"
+#include "components/update_client/persisted_data.h"
 #include "components/update_client/update_checker.h"
 
 namespace update_client {
@@ -54,6 +55,9 @@ UpdateEngine::UpdateEngine(
       update_checker_factory_(update_checker_factory),
       crx_downloader_factory_(crx_downloader_factory),
       ping_manager_(ping_manager),
+      metadata_(
+          new PersistedData(config->GetMetadataPath(),
+          config->GetSequencedTaskRunner())),
       notify_observers_callback_(notify_observers_callback) {
 }
 
@@ -98,7 +102,7 @@ void UpdateEngine::Update(
 
   CrxUpdateItem update_item;
   scoped_ptr<ActionUpdateCheck> update_check_action(new ActionUpdateCheck(
-      (*update_context->update_checker_factory)(config_),
+      (*update_context->update_checker_factory)(config_, metadata_),
       config_->GetBrowserVersion(), config_->ExtraRequestParams()));
 
   update_context->current_action.reset(update_check_action.release());