[Offline Pages] Delete associated page along with bookmark.

components/offline_pages/stub_offline_page_model.h

Index: components/offline_pages/stub_offline_page_model.h
diff --git a/components/offline_pages/stub_offline_page_model.h b/components/offline_pages/stub_offline_page_model.h
index 36515df8a8168c811ca60519ffb80f970153f9b1..59085c60a59da22c22d21fe394269a6e437b320a 100644
--- a/components/offline_pages/stub_offline_page_model.h
+++ b/components/offline_pages/stub_offline_page_model.h
@@ -68,6 +68,8 @@ class StubOfflinePageModel : public OfflinePageModel {
   void ExpirePages(const std::vector<int64_t>& offline_ids,
                    const base::Time& expiration_time,
                    const base::Callback<void(bool)>& callback) override;
+  void ExpireRemovedBookmarkPage(const bookmarks::BookmarkNode* node) override;
+  OfflinePageBookmarkObserver* GetBookmarkObserver() override;
   ClientPolicyController* GetPolicyController() override;
   bool is_loaded() const override;
   OfflineEventLogger* GetLogger() override;