Google is proposing and very actively working in the WHATWG and both WebKit and V8 are open source. So you can easily access the specifications for these APIs and see how they implemented them. It's the absolute opposite of "the Microsoft way". They even hired Ian Hickson, who pretty much is the "web standards guy".
It's not Google's fault that the other browser vendors are not as fast as them. They will eventually catch up and we'll all have a better web. I'm really glad the situation has changed so much since the days of "IE 6 only" and later "we all have to wait for the slow learning kid, IE". For a web developer these days are truly exciting.
they're not standard APIs, they're Google's API. Having an open source product doesn't mean the process is open, or the APIs are standardized.
The reason why they're not standardized and that nobody pushes for a standard too is simple. Most of them are very much tied to Chrome itself, instead of being tied to features, and have no sense being used by another browser.
I'll take webapps that works in ANY browser over "webapps" that works with Chrome ONLY any day of the 2013 year.
Embrace extend extinguish the web Google? Thanks but no thanks!