[Offline Pages] Create a event/activity logger

components/offline_pages/background/request_coordinator_event_logger.cc

+// 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.
+
+#include "components/offline_pages/background/request_coordinator_event_logger.h"
+
+namespace offline_pages {
+
+void RequestCoordinatorEventLogger::RecordSavePageRequestUpdated(
+    const std::string& name_space,
+    const std::string& new_status,
+    const std::string& id) {
+  RecordActivity("Save page request for ID: " + id + " and namespace: " +
+                 name_space + " has been updated with status " + new_status);
+}
+
+}  // namespace offline_pages