Move undo files into //components/undo

chrome/browser/undo/bookmark_undo_utils.cc

-// Copyright 2014 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.
-
-#include "chrome/browser/undo/bookmark_undo_utils.h"
-
-#include "chrome/browser/undo/bookmark_undo_service.h"
-#include "chrome/browser/undo/undo_manager.h"
-
-// ScopedSuspendBookmarkUndo --------------------------------------------------
-
-ScopedSuspendBookmarkUndo::ScopedSuspendBookmarkUndo(
-    BookmarkUndoService* bookmark_undo_service)
-    : undo_manager_(bookmark_undo_service
-                        ? bookmark_undo_service->undo_manager()
-                        : nullptr) {
-  if (undo_manager_)
-    undo_manager_->SuspendUndoTracking();
-}
-
-ScopedSuspendBookmarkUndo::~ScopedSuspendBookmarkUndo() {
-  if (undo_manager_)
-    undo_manager_->ResumeUndoTracking();
-}