Allenbrunson's point is that WebKit is an example of Apple's influence beyond Apple. You could argue that the choice of WebKit wasn't important to Chrome- that

Allenbrunson's point is that WebKit is an example of Apple's influence beyond Apple. You could argue that the choice of WebKit wasn't important to Chrome- that they would have been just as successful had they chose another rendering engine. But they did choose it. And that is either true irrespective of the fact that WebKit is based on KHTML.