Prepare to abstract PersistedData by making it part of the configurator.

chrome/browser/component_updater/chrome_component_updater_configurator.cc

Index: chrome/browser/component_updater/chrome_component_updater_configurator.cc
diff --git a/chrome/browser/component_updater/chrome_component_updater_configurator.cc b/chrome/browser/component_updater/chrome_component_updater_configurator.cc
index ced40dc884115b947cac49cb5f8887ba18ee386d..bb3af8d37fc25d2cbce73ba505654ff6bfd9c6cd 100644
--- a/chrome/browser/component_updater/chrome_component_updater_configurator.cc
+++ b/chrome/browser/component_updater/chrome_component_updater_configurator.cc
@@ -22,6 +22,7 @@
 #include "components/component_updater/configurator_impl.h"
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/pref_service.h"
+#include "components/update_client/persisted_data.h"
 #include "components/update_client/update_query_params.h"
 
 #if defined(OS_WIN)
@@ -63,8 +64,8 @@ class ChromeConfigurator : public update_client::Configurator {
   bool EnabledCupSigning() const override;
   scoped_refptr<base::SequencedTaskRunner> GetSequencedTaskRunner()
       const override;
-  PrefService* GetPrefService() const override;
   bool IsPerUserInstall() const override;
+  std::unique_ptr<update_client::PersistedData> CreateMetadata() const override;
 
  private:
   friend class base::RefCountedThreadSafe<ChromeConfigurator>;
@@ -190,15 +191,16 @@ ChromeConfigurator::GetSequencedTaskRunner() const {
        base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN});
 }
 
-PrefService* ChromeConfigurator::GetPrefService() const {
-  DCHECK(pref_service_);
-  return pref_service_;
-}
-
 bool ChromeConfigurator::IsPerUserInstall() const {
   return component_updater::IsPerUserInstall();
 }
 
+std::unique_ptr<update_client::PersistedData>
+ChromeConfigurator::CreateMetadata() const {
+  DCHECK(pref_service_);
+  return base::MakeUnique<update_client::PersistedData>(pref_service_);
+}
+
 }  // namespace
 
 void RegisterPrefsForChromeComponentUpdaterConfigurator(