I am newbie. I want to know the answer about these 2 questions:
1. How do I check if the domain is in the chrome blacklist?
2. How to use a new domain instead of the domain that blocked by chrome? (Just buy a new domain and CNAME to old domain if it works?)
Thanks!
You mean a domain flagged by Google's SafeBrowsing, right?
1) You can check it with Google's official checker here: https://www.google.com/transparencyr...gnostic/?hl=en
2) Yes, buy a new domain, point it to your server/CDN and replace the URL in your tracker.
Yes. Because my CTR is slow down from 30% to 10%, so I want to test this to make sure my domain works on Chrome.
Thanks for your help. erikgyepes 
No problem and you are on right track as sudden drop of CTR is one of the first signs that your domain was flagged.
Yes, just point it to the same one. Flagged is only your domain.
Was your tracking link flagged as well? I never really had flagged those, just the landing page domains.