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

ios/chrome/browser/component_updater/ios_component_updater_configurator.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ios/chrome/browser/component_updater/ios_component_updater_configurator.h"
 
 #include <string>
 #include <vector>
 
+#include "base/memory/ptr_util.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/version.h"
 #include "components/component_updater/configurator_impl.h"
 #include "components/update_client/out_of_process_patcher.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"
 #include "ios/chrome/common/channel_info.h"
 #include "ios/web/public/web_thread.h"
 
 namespace component_updater {
 
 namespace {
 
@@ skipping 21 matching lines @@
   scoped_refptr<update_client::OutOfProcessPatcher> CreateOutOfProcessPatcher()
       const override;
   bool EnabledDeltas() const override;
   bool EnabledComponentUpdates() const override;
   bool EnabledBackgroundDownloader() const override;
   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<IOSConfigurator>;
 
   ConfiguratorImpl configurator_impl_;
 
   ~IOSConfigurator() override {}
 };
 
 // Allows the component updater to use non-encrypted communication with the
@@ skipping 97 matching lines @@
 }
 
 PrefService* IOSConfigurator::GetPrefService() const {
   return GetApplicationContext()->GetLocalState();
 }
 
 bool IOSConfigurator::IsPerUserInstall() const {
   return true;
 }
 
+std::unique_ptr<update_client::PersistedData> IOSConfigurator::CreateMetadata()
+    const {
+  return base::MakeUnique<update_client::PersistedData>(GetPrefService());
+}
+
 }  // namespace
 
 scoped_refptr<update_client::Configurator> MakeIOSComponentUpdaterConfigurator(
     const base::CommandLine* cmdline,
     net::URLRequestContextGetter* context_getter) {
   return base::MakeShared<IOSConfigurator>(cmdline, context_getter);
 }
 
 }  // namespace component_updater