Patch by Andreas Kling <firstname.lastname@example.org> on 2011-08-25
Reviewed by Benjamin Poulain.
(WebCore::CanvasRenderingContext2D::stroke): Remove Qt-specific optimization
since calling Path::boundingRect() will now do exactly the same thing.
(WebCore::Path::boundingRect): Return QPainterPath::controlPointRect() since
that is much faster than computing the (precise) QPainterPath::boundingRect()
and Path::boundingRect() is not expected to be 100% precise anyway.