Upstream oodles of Chrome for Android code into Chromium.

chrome/browser/android/history_report/historic_visits_migration_task.h

+// 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.
+
+#ifndef CHROME_BROWSER_ANDROID_HISTORY_REPORT_HISTORIC_VISITS_MIGRATION_TASK_H_
+#define CHROME_BROWSER_ANDROID_HISTORY_REPORT_HISTORIC_VISITS_MIGRATION_TASK_H_
+
+#include "base/synchronization/waitable_event.h"
+#include "components/history/core/browser/history_db_task.h"
+
+namespace history_report {
+class UsageReportsBufferService;
+
+class HistoricVisitsMigrationTask : public history::HistoryDBTask {
+ public:
+  HistoricVisitsMigrationTask(base::WaitableEvent* event,
+                              UsageReportsBufferService* report_buffer_service);
+
+  bool RunOnDBThread(history::HistoryBackend* backend,
+                             history::HistoryDatabase* db) override;
+  void DoneRunOnMainThread() override {}
+
+ private:
+  ~HistoricVisitsMigrationTask() override {}
+
+  base::WaitableEvent* wait_event_;
+  UsageReportsBufferService* usage_reports_buffer_service_;
+
+  DISALLOW_COPY_AND_ASSIGN(HistoricVisitsMigrationTask);
+};
+
+}  // namespace history_report
+
+#endif  // CHROME_BROWSER_ANDROID_HISTORY_REPORT_HISTORIC_VISITS_MIGRATION_TASK_H_