Move bookmarks' test support file to the bookmarks component

chrome/browser/bookmarks/bookmark_test_helpers.h

-// 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_BOOKMARKS_BOOKMARK_TEST_HELPERS_H_
-#define CHROME_BROWSER_BOOKMARKS_BOOKMARK_TEST_HELPERS_H_
-
-#include <string>
-
-class BookmarkModel;
-class BookmarkNode;
-
-namespace test {
-
-// Blocks until |model| finishes loading.
-void WaitForBookmarkModelToLoad(BookmarkModel* model);
-
-// Return the descendants of |node| as a string useful for verifying node
-// modifications. The format of the resulting string is:
-//
-//           result = node " " , { node " " }
-//             node = bookmark title | folder
-//           folder = folder title ":[ " { node " " } "]"
-//   bookmark title = (* string with no spaces *)
-//     folder title = (* string with no spaces *)
-//
-// Example: "a f1:[ b d c ] d f2:[ e f g ] h "
-//
-// (Logically, we should use |string16|s, but it's more convenient for test
-// purposes to use (UTF-8) |std::string|s.)
-std::string ModelStringFromNode(const BookmarkNode* node);
-
-// Create and add the node hierarchy specified by |model_string| to the
-// bookmark node given by |node|. The string has the same format as
-// specified for ModelStringFromNode(). The new nodes added to |node|
-// are appended to the end of node's existing subnodes, if any.
-// |model| must be the model of which |node| is a member.
-// NOTE: The string format is very rigid and easily broken if not followed
-//       exactly (since we're using a very simple parser).
-void AddNodesFromModelString(BookmarkModel* model,
-                             const BookmarkNode* node,
-                             const std::string& model_string);
-}  // namespace test
-
-#endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_TEST_HELPERS_H_