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

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/path_service.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/version.h"
 #include "components/component_updater/configurator_impl.h"
 #include "components/update_client/component_patcher_operation.h"
 #include "ios/chrome/browser/application_context.h"
+#include "ios/chrome/browser/chrome_paths.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 {
 
 class IOSConfigurator : public update_client::Configurator {
  public:
@@ skipping 16 matching lines @@
   std::string ExtraRequestParams() const override;
   std::string GetDownloadPreference() const override;
   net::URLRequestContextGetter* RequestContext() const override;
   scoped_refptr<update_client::OutOfProcessPatcher> CreateOutOfProcessPatcher()
       const override;
   bool DeltasEnabled() const override;
   bool UseBackgroundDownloader() const override;
   bool UseCupSigning() const override;
   scoped_refptr<base::SequencedTaskRunner> GetSequencedTaskRunner()
       const override;
+  base::FilePath GetMetadataPath() 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 84 matching lines @@
 }
 
 scoped_refptr<base::SequencedTaskRunner>
 IOSConfigurator::GetSequencedTaskRunner() const {
   return web::WebThread::GetBlockingPool()
       ->GetSequencedTaskRunnerWithShutdownBehavior(
           web::WebThread::GetBlockingPool()->GetSequenceToken(),
           base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
 }
 
+base::FilePath IOSConfigurator::GetMetadataPath() const {
+  base::FilePath result;
+  if (PathService::Get(ios::DIR_USER_DATA, &result))
+    return result.AppendASCII("component_metadata.json");
+  return base::FilePath();
+}
+
 }  // namespace
 
 scoped_refptr<update_client::Configurator> MakeIOSComponentUpdaterConfigurator(
     const base::CommandLine* cmdline,
     net::URLRequestContextGetter* context_getter) {
   return new IOSConfigurator(cmdline, context_getter);
 }
 
 }  // namespace component_updater