[Offline Pages] Delete associated page along with bookmark.

components/bookmarks/browser/owned_bookmark_model_observer.h

Index: components/bookmarks/browser/owned_bookmark_model_observer.h
diff --git a/components/bookmarks/browser/owned_bookmark_model_observer.h b/components/bookmarks/browser/owned_bookmark_model_observer.h
new file mode 100644
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+++ b/components/bookmarks/browser/owned_bookmark_model_observer.h
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+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_BOOKMARKS_BROWSER_OWNED_BOOKMARK_MODEL_OBSERVER_H_
+#define COMPONENTS_BOOKMARKS_BROWSER_OWNED_BOOKMARK_MODEL_OBSERVER_H_
+
+#include "components/bookmarks/browser/base_bookmark_model_observer.h"
+
+namespace bookmarks {
+
+class OwnedBookmarkModelObserver : public BaseBookmarkModelObserver {
+ public:
+  // Implement BaseBookmarkModelObserver
+  void BookmarkModelChanged() override {}
+  void BookmarkNodeRemoved(BookmarkModel* model,
+                           const BookmarkNode* parent,
+                           int old_index,
+                           const BookmarkNode* node,
+                           const std::set<GURL>& removed_urls) override {}
+};
+
+}  // namespace bookmarks
+
+#endif  // COMPONENTS_BOOKMARKS_BROWSER_OWNED_BOOKMARK_MODEL_OBSERVER_H_