Webkit guys want to remove support for V8 (and any JS engine apart from their own JSC engine) due to maintenance and complexity conerns BUT:
* Qt 5.x uses V8 in Qt's Webkit
* Samsung uses V8 (In a unofficial fork of WebkitGTK+ by the looks of it).
* Oracle want to add support for their own JS Engine to webkit.
Resolving this one amicably should be interesting. If you want to use Webkit on windows with anything other than JSC it looks like you might want to start investigating blink in detail.
* I probably am.