[Offline Pages] Create a event/activity logger

components/offline_pages/offline_page_model.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 COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_
 #define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/supports_user_data.h"
+#include "components/offline_pages/offline_event_logger.h"
 #include "components/offline_pages/offline_page_archiver.h"
 #include "components/offline_pages/offline_page_storage_manager.h"
 #include "components/offline_pages/offline_page_types.h"
 
 class GURL;
 namespace base {
 class Time;
 }  // namespace base
 
 namespace offline_pages {
@@ skipping 160 matching lines @@
   // archive files.
   virtual void ExpirePages(const std::vector<int64_t>& offline_ids,
                            const base::Time& expiration_time,
                            const base::Callback<void(bool)>& callback) = 0;
 
   // Returns the policy controller.
   virtual ClientPolicyController* GetPolicyController() = 0;
 
   // TODO(dougarnett): Remove this and its uses.
   virtual bool is_loaded() const = 0;
+
+  // Returns the logger. Ownership is retained by the model.
+  virtual OfflineEventLogger* GetLogger() = 0;
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_H_