[webkit-help] Does webkit-cairo support html5 video label(ENABLE_VIDEO)?

[yanghb]

I'm building webkit-cairo-win32 with ENABLE_VIDEO, but
encounter:MediaPlayerPrivateQuickTimeVisualContext::registerMediaEngine()
cannot be compiled, because of it use
CGContextRef context = p->platformContext(), but cairo version
returned a _cairo * type,
what should I do? does webkit-cairo version not support html5 video label?