RenderMathMLUnderOver adds spacing to the child operator indefinitely when resizing...

RenderMathMLUnderOver adds spacing to the child operator indefinitely when resizing the window.
https://bugs.webkit.org/show_bug.cgi?id=137330

Patch by Said Abou-Hallawa <sabouhallawa@apple.com> on 2014-10-10
Reviewed by Simon Fraser.

Change the layout with resize test of the MathML underover object from being render tree test
to be reference test. The render test was failing on WK2 because it was doing window resizing
and view zooming.  The new test rely solely on forcing the layout synchronously by resizing the
math container <div> element.

* mathml/opentype/munderover-layout-resize-expected.html: Added.
* mathml/opentype/munderover-layout-resize.html: Added.
* mathml/opentype/munderover-window-resize-expected.txt: Removed.
* mathml/opentype/munderover-window-resize.html: Removed.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@174614 268f45cc-cd09-0410-ab3c-d52691b4dbfc