Try the original CL "Always persist bookmark IDs" again with the fix to...

chrome/browser/extensions/extension_bookmarks_module.h

 // Copyright (c) 2009 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_BOOKMARKS_MODULE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_BOOKMARKS_MODULE_H_
 
 #include <string>
 
 #include "base/singleton.h"
@@ skipping 52 matching lines @@
   std::set<BookmarkModel*> models_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionBookmarkEventRouter);
 };
 
 class BookmarksFunction : public AsyncExtensionFunction,
                           public NotificationObserver {
   virtual void Run();
   virtual bool RunImpl() = 0;
 
+ protected:
+  // Helper to get the bookmark id as int64 from the given string id.
+  // Sets error_ to an errro string if the given id string can't be parsed
+  // as an int64. In case of error, doesn't change id and returns false.
+  bool GetBookmarkIdAsInt64(const std::string& id_string, int64* id);
+
  private:
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
   NotificationRegistrar registrar_;
 };
 
 class GetBookmarksFunction : public BookmarksFunction {
   virtual bool RunImpl();
 };
@@ skipping 20 matching lines @@
 
 class MoveBookmarkFunction : public BookmarksFunction {
   virtual bool RunImpl();
 };
 
 class SetBookmarkTitleFunction : public BookmarksFunction {
   virtual bool RunImpl();
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_BOOKMARKS_MODULE_H_