The MathML pixel tests have changed a lot after http://trac.webkit.org/wiki/MathML/Early_2016_Refactoring#Phase1 After bug 153991, we should update the text & pixel references and remove the failure expectation for the test roots.xhtml and mo-stretch.html
On iOS, references should be updated too: mathml/opentype/large-operators.html mathml/opentype/vertical.html
I already reorganized a bit the TestExpectation to make things easier. https://trac.webkit.org/changeset/202729
https://trac.webkit.org/changeset/202730
Committed r202748: <http://trac.webkit.org/changeset/202748>
I just rebaseline all the pixel tests. Some of them will need to be rebaseline again after bug 153991.