Yes, blink is the engine Chromium uses. Since KHTML was an open source project any project based on it will have to be open source, unless of course it’s just used as a library. Even in that case though blink the engine is forced to be open source even if the browser as a whole isn’t. GNU licenses are considered infectious because anything containing any GNU code automatically and legally becomes open source. So KHTML being unmaintained is irrelevant.
Yes, blink is the engine Chromium uses. Since KHTML was an open source project any project based on it will have to be open source, unless of course it’s just used as a library. Even in that case though blink the engine is forced to be open source even if the browser as a whole isn’t. GNU licenses are considered infectious because anything containing any GNU code automatically and legally becomes open source. So KHTML being unmaintained is irrelevant.