Did you not read what I said? I never imported any bookmarks. I just opened Chrome, typed "twitter.com" and hit enter.
It prompted for access to the single keychain entry for twitter.com and then created it's own copy after I hit "allow".
No, it does not make any sense to create a copy, even if I was importing from Safari. If it's going to use the system keychain, it should use it in a sensible manner.
I noticed this a while ago. Google is being "evil" here in the sense that it doesn't want to use Apple's security tools (keychain access) and wants to use its own authentication methods.
The correct (apple-canon) behavior is to ask for the password every time a user wants to access her keychain (until the end of the session). This doesn't suit google which has its own security paradigm of sign-in-once-access-until-signout. This is why it creates a copy of your passwords to do whatever it pleases with..
It prompted for access to the single keychain entry for twitter.com and then created it's own copy after I hit "allow".
No, it does not make any sense to create a copy, even if I was importing from Safari. If it's going to use the system keychain, it should use it in a sensible manner.