Update multiview state on program executable change Relinking the active program can change its number of views and the state has to be correspondingly adjusted. BUG=angleproject:2062 TEST=angle_end2end_tests Change-Id: I20102a428d7566a8cec5d81eeaa55980665812f4 Reviewed-on: https://chromium-review.googlesource.com/637994 Commit-Queue: Martin Radev <mradev@nvidia.com> Reviewed-by: Olli Etuaho <oetuaho@nvidia.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>