[Offline pages] Adding expiration capability to OfflinePageModel

components/offline_pages/offline_page_item.cc

 // 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.
 
 #include "components/offline_pages/offline_page_item.h"
 
 #include "net/base/filename_util.h"
 
 namespace offline_pages {
 
@@ skipping 50 matching lines @@
 
 OfflinePageItem::OfflinePageItem(const OfflinePageItem& other) = default;
 
 OfflinePageItem::~OfflinePageItem() {
 }
 
 GURL OfflinePageItem::GetOfflineURL() const {
   return net::FilePathToFileURL(file_path);
 }
 
+bool OfflinePageItem::IsExpired() const {
+  return creation_time < expiration_time;
+}
+
 }  // namespace offline_pages