[Useless] Hooking up storage manager in page model.

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 d5fe0fb782649a99befb40dc2d0806e089dc813c..ae12e6ac60e013bc8e3a42044c983d539801d5a1 100644
--- a/components/offline_pages/offline_page_model.h
+++ b/components/offline_pages/offline_page_model.h
@@ -215,6 +215,9 @@ class OfflinePageModel : public KeyedService,
   // observers.
   void CheckForExternalFileDeletion();
 
+  // Call storage manager to clear expired pages explicitly.
+  void ExpirePages(const OfflinePageStorageManager::ClearPagesCallback&);
+
   // Returns the policy controller.
   ClientPolicyController* GetPolicyController();
 
@@ -329,6 +332,11 @@ class OfflinePageModel : public KeyedService,
   void DoDeletePagesByURLPredicate(const UrlPredicate& predicate,
                                    const DeletePageCallback& callback);
 
+  // Callbacks for calling storage manager to expire pages.
+  void OnExpiredPagesCleared(
+      const int expired_page_count,
+      OfflinePageStorageManager::ClearStorageResult result);
+
   void RunWhenLoaded(const base::Closure& job);
 
   // Persistent store for offline page metadata.