Fix constructor parsing issues After this patch, ANGLE no longer accepts constructors where any of multiple parameters is sampler or void. Also, structure array constructors with just one parameter are now accepted. Error message for a constructor with no parameters is also more informative than before. BUG=angleproject:1193 TEST=angle_unittests Change-Id: I6b897973448cf500096f612b3b95dcc23aebc716 Reviewed-on: https://chromium-review.googlesource.com/311590 Reviewed-by: Zhenyao Mo <zmo@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Tryjob-Request: Olli Etuaho <oetuaho@nvidia.com> Tested-by: Olli Etuaho <oetuaho@nvidia.com>