chromium mac编译文档

mac编译文档：https://chromium.googlesource.com/chromium/src/+/master/docs/mac_build_instructions.md

可以查看这个 https://segmentfault.com/a/1190000039187933

参考性文档：https://blog.csdn.net/dangwei_90/article/details/100926129

https://www.jianshu.com/p/4ba1d2275767

https://www.freesion.com/article/6031202678/