[Offline Pages] Delete associated page along with bookmark.

components/bookmarks/browser/bookmark_model.h

Index: components/bookmarks/browser/bookmark_model.h
diff --git a/components/bookmarks/browser/bookmark_model.h b/components/bookmarks/browser/bookmark_model.h
index 61cdfa48bc417a24941731d52af91ecfbd698d70..1c10ece2d300b3c104eddc7ef981aa589bb15946 100644
--- a/components/bookmarks/browser/bookmark_model.h
+++ b/components/bookmarks/browser/bookmark_model.h
@@ -51,6 +51,7 @@ class BookmarkLoadDetails;
 class BookmarkModelObserver;
 class BookmarkStorage;
 class BookmarkUndoDelegate;
+class OfflinePageBookmarkObserver;
 class ScopedGroupBookmarkActions;
 class TestBookmarkClient;
 struct BookmarkMatch;
@@ -73,7 +74,9 @@ class BookmarkModel : public BookmarkUndoProvider,
     base::string16 title;
   };
 
-  explicit BookmarkModel(std::unique_ptr<BookmarkClient> client);
+  BookmarkModel(
+      std::unique_ptr<BookmarkClient> client,
+      std::unique_ptr<OfflinePageBookmarkObserver> offline_page_observer);
   ~BookmarkModel() override;
 
   // KeyedService:
@@ -422,6 +425,8 @@ class BookmarkModel : public BookmarkUndoProvider,
 
   std::unique_ptr<BookmarkClient> client_;
 
+  std::unique_ptr<OfflinePageBookmarkObserver> offline_page_observer_;
+
   // Whether the initial set of data has been loaded.
   bool loaded_;