[Offline pages] Selecting pages for clean up

components/offline_pages/offline_page_model.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_model.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
@@ skipping 162 matching lines @@
   for (const auto& id_page_pair : offline_pages_)
     offline_pages.push_back(id_page_pair.second);
   return offline_pages;
 }
 
 const std::vector<OfflinePageItem> OfflinePageModel::GetPagesToCleanUp() const {
   DCHECK(is_loaded_);
   std::vector<OfflinePageItem> offline_pages;
   base::Time now = base::Time::Now();
   for (const auto& id_page_pair : offline_pages_) {
-    if (now - id_page_pair.second.creation_time > kPageCleanUpThreshold)
+    if (now - id_page_pair.second.last_access_time > kPageCleanUpThreshold)
       offline_pages.push_back(id_page_pair.second);
   }
   return offline_pages;
 }
 
 const OfflinePageItem* OfflinePageModel::GetPageByBookmarkId(
     int64 bookmark_id) const {
   const auto iter = offline_pages_.find(bookmark_id);
   return iter != offline_pages_.end() ? &(iter->second) : nullptr;
 }
@@ skipping 168 matching lines @@
 void OfflinePageModel::InformDeletePageDone(const DeletePageCallback& callback,
                                             DeletePageResult result) {
   UMA_HISTOGRAM_ENUMERATION(
       "OfflinePages.DeletePageResult",
       static_cast<int>(result),
       static_cast<int>(DeletePageResult::RESULT_COUNT));
   callback.Run(result);
 }
 
 }  // namespace offline_pages