[Offline Pages] Create a event/activity logger

components/offline_pages/background/request_coordinator_event_logger.h

+// Copyright 2016 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 COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_EVENT_LOGGER_H_
+#define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_EVENT_LOGGER_H_
+
+#include "components/offline_pages/offline_event_logger.h"
+
+namespace offline_pages {
+
+class RequestCoordinatorEventLogger : public OfflineEventLogger {
+ public:
+  // Records that a background task has been updated.
+  void RecordSavePageRequestUpdated(const std::string& name_space,
+                                    const std::string& new_status,
+                                    const std::string& id);

[fgorski, 2016/06/23 16:34:06]

Which ID is this referring to?
Please document and perhaps rename.

[chili, 2016/06/24 02:45:50]

Done.

+};
+
+}  // namespace offline_pages
+
+#endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_EVENT_LOGGER_H_