[Offline pages] Extracting callbacks from the Offline Page Model

components/offline_pages/offline_page_storage_manager.h

Index: components/offline_pages/offline_page_storage_manager.h
diff --git a/components/offline_pages/offline_page_storage_manager.h b/components/offline_pages/offline_page_storage_manager.h
index 73901de71c233cc7990dbcdea6178727e06f2d89..884ddd391a79675acd8a52a13ef4025994b3d574 100644
--- a/components/offline_pages/offline_page_storage_manager.h
+++ b/components/offline_pages/offline_page_storage_manager.h
@@ -36,7 +36,7 @@ class OfflinePageStorageManager {
   // Callback used when calling ClearPagesIfNeeded.
   // int: the number of deleted pages.
   // DeletePageResult: result of deleting pages.
-  typedef base::Callback<void(int, OfflinePageModel::DeletePageResult)>
+  typedef base::Callback<void(int, DeletePageResult)>
       ClearPageCallback;
 
   explicit OfflinePageStorageManager(OfflinePageModel* model);
@@ -52,17 +52,17 @@ class OfflinePageStorageManager {
   // to |GetAllPages|.
   void ClearExpiredPages(
       const ClearPageCallback& callback,
-      const OfflinePageModel::MultipleOfflinePageItemResult& pages);
+      const MultipleOfflinePageItemResult& pages);
 
   // Gets offline IDs of all expired pages and return in |offline_ids|.
   void GetExpiredPageIds(
-      const OfflinePageModel::MultipleOfflinePageItemResult& pages,
+      const MultipleOfflinePageItemResult& pages,
       std::vector<int64_t>& offline_ids);
 
   // Callback when expired pages has been deleted.
   void OnExpiredPagesDeleted(const ClearPageCallback& callback,
                              int pages_to_clear,
-                             OfflinePageModel::DeletePageResult result);
+                             DeletePageResult result);
 
   // Determine if manager should clear pages.
   bool ShouldClearPages();