Remove dependency on //chrome from bookmark_undo_utils

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/bookmark_undo_service_factory.h"
 #include "chrome/browser/undo/undo_manager.h"
 
-namespace {
-
-// Utility funciton to safely return an UndoManager if available.
-UndoManager* GetUndoManager(Profile* profile) {
-  BookmarkUndoService* undo_service = profile ?
-      BookmarkUndoServiceFactory::GetForProfile(profile) : NULL;
-  return undo_service ? undo_service->undo_manager() : NULL;
-}
-
-}  // namespace
-
 // ScopedSuspendBookmarkUndo --------------------------------------------------
 
-ScopedSuspendBookmarkUndo::ScopedSuspendBookmarkUndo(Profile* profile)
-    : profile_(profile) {
-  UndoManager* undo_manager = GetUndoManager(profile_);
-  if (undo_manager)
-    undo_manager->SuspendUndoTracking();
+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() {
-  UndoManager *undo_manager = GetUndoManager(profile_);
-  if (undo_manager)
-    undo_manager->ResumeUndoTracking();
+  if (undo_manager_)
+    undo_manager_->ResumeUndoTracking();
 }