[Qt] LayoutTest: Replace setTimeout with synchronous layout for frame flattening...

[Qt] LayoutTest: Replace setTimeout with synchronous layout for frame flattening where possible.
https://bugs.webkit.org/show_bug.cgi?id=84028

Patch by Zalan Bujtas <zbujtas@gmail.com> on 2012-04-16
Reviewed by Kenneth Rohde Christiansen.

It's safer (and faster) to force synchronous layout, than expecting a layout before setTimout(0) hits.

* fast/frames/flattening/crash-svg-document.html: Remove extra line so that non-svg builds don't report failure.
* fast/frames/flattening/frameset-flattening-advanced.html:
* fast/frames/flattening/frameset-flattening-grid.html:
* fast/frames/flattening/frameset-flattening-subframesets.html:
* fast/frames/flattening/iframe-flattening-fixed-height.html:
* fast/frames/flattening/iframe-flattening-fixed-width-and-height-no-scrolling-with-js-forced-layout.html:
* fast/frames/flattening/iframe-flattening-fixed-width-and-height-no-scrolling.html:
* fast/frames/flattening/iframe-flattening-fixed-width-and-height-zero-size.html:
* fast/frames/flattening/iframe-flattening-fixed-width.html:
* fast/frames/flattening/iframe-flattening-nested.html:
* fast/frames/flattening/iframe-flattening-offscreen.html:
* fast/frames/flattening/iframe-flattening-out-of-view-scroll-and-relayout.html:
* fast/frames/flattening/iframe-flattening-out-of-view.html:
* fast/frames/flattening/iframe-flattening-selection-crash.html:
* fast/frames/flattening/iframe-flattening-simple.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@114262 268f45cc-cd09-0410-ab3c-d52691b4dbfc