Created attachment 274190 [details]
When the base of an munderover/munder/mover element is an operator with the movablelimits=true property in displaystyle=false ; it should render the same as the equivalent msubsup/msub/sup. After the MathML refactoring, it is easy: we essentially need to make RenderMathMLUnderOver inherits from RenderMathMLScripts. This actually allows to share more code between the two classes.
I'm attaching a WIP patch. I plan to add new tests and to test it on mac too tomorrow.
Created attachment 274191 [details]
Created attachment 274192 [details]
Created attachment 274270 [details]
Created attachment 277379 [details]
Created attachment 282053 [details]
Comment on attachment 282053 [details]
These changes seem okay. Please confirm tests pass with these updates in place before landing.
Created attachment 283111 [details]
Committed r202970: <http://trac.webkit.org/changeset/202970>