如何使用Xcode运行Chrome源代码

I downloaded the chromiums source code in GitHub. I looked through the files but couldn't find the chromium Xcode project. I really want to modify it and make a new web browser. I can't seem to modify or run it. Can you help me run the app and modify it?

如果这个问题不好,对不起,我真的没有那么多时间,因为我必须在5月21日之前上交该应用程序。