Re: Hmm...
It's the other way around; Google forked part of Webkit to build Blink. Although, prior to starting work on Blink, Google had become the biggest contributor to Webkit.
Like everybody else, I despair over the winnowing of browser engines. But they are such a huge investment and require such a lot of work. I suspect it's more pride than economic sense that stops Apple doing a Microsoft; I'm sure they could layer their privacy tweaks and architectural adaptions on top of Blink at less cost. (And with Mozilla struggling for cash, it's easy to imagine that in five years we find just wrappers round Blink... *sigh*)