Update access info when an offline page is being visited

components/offline_pages/offline_page_model.h

Index: components/offline_pages/offline_page_model.h
diff --git a/components/offline_pages/offline_page_model.h b/components/offline_pages/offline_page_model.h
index dd55a7e623af4c897380b82904d4cfcc84583e05..5fc03fb0632f48e65ffa6b6ca19ac6699814b9c6 100644
--- a/components/offline_pages/offline_page_model.h
+++ b/components/offline_pages/offline_page_model.h
@@ -103,6 +103,7 @@ class OfflinePageModel : public KeyedService,
   };
 
   typedef base::Callback<void(SavePageResult)> SavePageCallback;
+  typedef base::Callback<void(bool)> MarkPageAccessedCallback;
   typedef base::Callback<void(DeletePageResult)> DeletePageCallback;
 
   // All blocking calls/disk access will happen on the provided |task_runner|.
@@ -130,6 +131,12 @@ class OfflinePageModel : public KeyedService,
                 scoped_ptr<OfflinePageArchiver> archiver,
                 const SavePageCallback& callback);
 
+  // Marks that the offline page related to the passed |bookmark_id| has been
+  // accessed. Its access info, including last access time and access count,
+  // will be updated. Requires that the model is loaded.
+  void MarkPageAccessed(int64 bookmark_id,
+                        const MarkPageAccessedCallback& callback);
+
   // Deletes an offline page related to the passed |bookmark_id|. Requires that
   // the model is loaded.
   void DeletePageByBookmarkId(int64 bookmark_id,
@@ -203,6 +210,9 @@ class OfflinePageModel : public KeyedService,
   void InformDeletePageDone(const DeletePageCallback& callback,
                             DeletePageResult result);
 
+  void OnUpdateOfflinePageDone(const MarkPageAccessedCallback& callback,
+                               bool success);
+
   // Persistent store for offline page metadata.
   scoped_ptr<OfflinePageMetadataStore> store_;