Move undo files into //components/undo

chrome/browser/undo/bookmark_renumber_observer.h

Index: chrome/browser/undo/bookmark_renumber_observer.h
diff --git a/chrome/browser/undo/bookmark_renumber_observer.h b/chrome/browser/undo/bookmark_renumber_observer.h
deleted file mode 100644
index 19f0774fe762f09a850ffe0d058e2b9c81641192..0000000000000000000000000000000000000000
--- a/chrome/browser/undo/bookmark_renumber_observer.h
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2013 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 CHROME_BROWSER_UNDO_BOOKMARK_RENUMBER_OBSERVER_H_
-#define CHROME_BROWSER_UNDO_BOOKMARK_RENUMBER_OBSERVER_H_
-
-#include "base/basictypes.h"
-
-class BookmarkRenumberObserver {
- public:
-  // Invoked when a bookmark id has been renumbered so that any
-  // BookmarkUndoOperations that refer to that bookmark can be updated.
-  virtual void OnBookmarkRenumbered(int64 old_id, int64 new_id) = 0;
-
- protected:
-  virtual ~BookmarkRenumberObserver() {}
-};
-
-#endif  // CHROME_BROWSER_UNDO_BOOKMARK_RENUMBER_OBSERVER_H_