[Offline Pages] Delete associated page along with bookmark.

components/bookmarks/browser/bookmark_model.cc

Index: components/bookmarks/browser/bookmark_model.cc
diff --git a/components/bookmarks/browser/bookmark_model.cc b/components/bookmarks/browser/bookmark_model.cc
index 8d5b238a0c9a1d8cb90266e87f85b2d268dfb6d8..8519d268026c5177b7056bf612e31518716c87a5 100644
--- a/components/bookmarks/browser/bookmark_model.cc
+++ b/components/bookmarks/browser/bookmark_model.cc
@@ -24,6 +24,7 @@
 #include "components/bookmarks/browser/bookmark_storage.h"
 #include "components/bookmarks/browser/bookmark_undo_delegate.h"
 #include "components/bookmarks/browser/bookmark_utils.h"
+#include "components/bookmarks/browser/owned_bookmark_model_observer.h"
 #include "components/favicon_base/favicon_types.h"
 #include "grit/components_strings.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -107,8 +108,11 @@ class EmptyUndoDelegate : public BookmarkUndoDelegate {
 
 // BookmarkModel --------------------------------------------------------------
 
-BookmarkModel::BookmarkModel(std::unique_ptr<BookmarkClient> client)
+BookmarkModel::BookmarkModel(
+    std::unique_ptr<BookmarkClient> client,
+    std::unique_ptr<OwnedBookmarkModelObserver> offline_page_observer)
     : client_(std::move(client)),
+      offline_page_observer_(std::move(offline_page_observer)),
       loaded_(false),
       root_(GURL()),
       bookmark_bar_node_(NULL),
@@ -124,6 +128,8 @@ BookmarkModel::BookmarkModel(std::unique_ptr<BookmarkClient> client)
       empty_undo_delegate_(new EmptyUndoDelegate) {
   DCHECK(client_);
   client_->Init(this);
+  if (offline_page_observer_)
+    AddObserver(offline_page_observer_.get());
 }
 
 BookmarkModel::~BookmarkModel() {