ES31: GetTexLevelParameter support for multisampled texture for GL renderer BUG=angleproject:1679 TEST=dEQP-GLES31.functional.state_query.texture_level.texture_2d_multisample.* Change-Id: Ic31f079c0c999d695eb695413271bd0ad10d05ba Reviewed-on: https://chromium-review.googlesource.com/429930 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>