[webkit-reviews] review requested: [Bug 83980] Fixed background is scrolling in http://www.nieuwecode.nl/ in Qt webkit2 : [Attachment 138179] Patch.

[bugzilla-daemon at webkit.org]

Yael <yael.aharon at nokia.com> has asked	for review:
Bug 83980: Fixed background is scrolling in http://www.nieuwecode.nl/ in Qt
webkit2
https://bugs.webkit.org/show_bug.cgi?id=83980

Attachment 138179: Patch.
https://bugs.webkit.org/attachment.cgi?id=138179&action=review

------- Additional Comments from Yael <yael.aharon at nokia.com>
When a fixed position element does not have z-index explicitly specified, it
does not create a stacking context. This results in fixed elements scrolling
with the content layer.
This patch allows creating a stackig context for fixed positioned elements.
Added a manual test because this patch takes effect only during scrolling.