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

ios/chrome/browser/component_updater/ios_component_updater_configurator.cc

Index: ios/chrome/browser/component_updater/ios_component_updater_configurator.cc
diff --git a/ios/chrome/browser/component_updater/ios_component_updater_configurator.cc b/ios/chrome/browser/component_updater/ios_component_updater_configurator.cc
index 84baa7bd97584baed5585647cabfce928fa1b330..72b8aded466728e7e54139baec8ba5269ccacc4d 100644
--- a/ios/chrome/browser/component_updater/ios_component_updater_configurator.cc
+++ b/ios/chrome/browser/component_updater/ios_component_updater_configurator.cc
@@ -11,6 +11,7 @@
 #include "base/version.h"
 #include "components/component_updater/configurator_impl.h"
 #include "components/update_client/component_patcher_operation.h"
+#include "components/update_client/persisted_data.h"
 #include "components/update_client/update_query_params.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/google/google_brand.h"
@@ -52,6 +53,7 @@ class IOSConfigurator : public update_client::Configurator {
       const override;
   PrefService* GetPrefService() const override;
   bool IsPerUserInstall() const override;
+  update_client::PersistedData* CreateMetadata() const override;
 
  private:
   friend class base::RefCountedThreadSafe<IOSConfigurator>;
@@ -169,6 +171,10 @@ bool IOSConfigurator::IsPerUserInstall() const {
   return true;
 }
 
+update_client::PersistedData* IOSConfigurator::CreateMetadata() const {
+  return new update_client::PersistedData(GetPrefService());
+}
+
 }  // namespace
 
 scoped_refptr<update_client::Configurator> MakeIOSComponentUpdaterConfigurator(