[Offline Pages] Create a event/activity logger

components/offline_pages/offline_page_model_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/offline_page_model_event_logger.h"
+
+namespace offline_pages {
+
+void OfflinePageModelEventLogger::RecordPageSaved(const std::string& name_space,
+                                                  const std::string& url,
+                                                  const std::string& id) {
+  RecordActivity(url + " is saved at " + name_space + " with id " + id);
+}
+
+void OfflinePageModelEventLogger::RecordPageDeleted(const std::string& id) {
+  RecordActivity("Page with ID " + id + " has been deleted");
+}
+
+void OfflinePageModelEventLogger::RecordStoreClearError() {
+  RecordActivity("Offline store clear failed");
+}
+
+void OfflinePageModelEventLogger::RecordStoreCleared() {
+  RecordActivity("Offline store cleared");
+}
+
+void OfflinePageModelEventLogger::RecordStoreReloadError() {
+  RecordActivity("There was an error reloading the offline store");
+}
+}  // namespace offline_pages