Upstream oodles of Chrome for Android code into Chromium.

chrome/browser/android/history_report/data_provider.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_DATA_PROVIDER_H_
+#define CHROME_BROWSER_ANDROID_HISTORY_REPORT_DATA_PROVIDER_H_
+
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+#include "base/task/cancelable_task_tracker.h"
+
+class Profile;
+
+namespace history {
+class HistoryService;
+}
+
+namespace bookmarks {
+class BookmarkModel;
+}
+
+namespace history_report {
+
+class DeltaFileEntryWithData;
+class DeltaFileService;
+class UsageReportsBufferService;
+
+// Provides data from History and Bookmark backends.
+class DataProvider {
+ public:
+  DataProvider(Profile* profile,
+               DeltaFileService* delta_file_service,
+               bookmarks::BookmarkModel* bookmark_model);
+  ~DataProvider();
+
+  // Provides up to limit delta file entries with sequence number > last_seq_no.
+  scoped_ptr<std::vector<DeltaFileEntryWithData> > Query(int64 last_seq_no,
+                                                         int32 limit);
+  void StartVisitMigrationToUsageBuffer(
+      UsageReportsBufferService* buffer_service);
+
+ private:
+  void RecreateLog();
+
+  history::HistoryService* history_service_;
+  bookmarks::BookmarkModel* bookmark_model_;
+  DeltaFileService* delta_file_service_;
+  base::CancelableTaskTracker history_task_tracker_;
+
+  DISALLOW_COPY_AND_ASSIGN(DataProvider);
+};
+
+}  // namespace history_report
+
+#endif  // CHROME_BROWSER_ANDROID_HISTORY_REPORT_DATA_PROVIDER_H_