Move bookmarks extension api implementation to bookmarks dir

chrome/browser/extensions/extension_bookmark_helpers.h

-// Copyright (c) 2010 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_EXTENSIONS_EXTENSION_BOOKMARK_HELPERS_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_BOOKMARK_HELPERS_H_
-#pragma once
-
-#include <string>
-
-#include "base/basictypes.h"
-
-class BookmarkModel;
-class BookmarkNode;
-
-namespace base {
-class DictionaryValue;
-class ListValue;
-}
-
-// Helper functions.
-namespace extension_bookmark_helpers {
-
-base::DictionaryValue* GetNodeDictionary(const BookmarkNode* node,
-                                         bool recurse,
-                                         bool only_folders);
-
-// Add a JSON representation of |node| to the JSON |list|.
-void AddNode(const BookmarkNode* node, base::ListValue* list, bool recurse);
-
-void AddNodeFoldersOnly(const BookmarkNode* node,
-                        base::ListValue* list,
-                        bool recurse);
-
-bool RemoveNode(BookmarkModel* model,
-                int64 id,
-                bool recursive,
-                std::string* error);
-
-}  // namespace extension_bookmark_helpers
-
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_BOOKMARK_HELPERS_H_