This is needed to effectively use the new APIs to get shader variable info. BUG=angle::770 TEST=ShaderVariableTest Change-Id: Ia591eb567868ebe898f4a7449c64167ad212f59b Reviewed-on: https://chromium-review.googlesource.com/221388Tested-by: Zhenyao Mo <zmo@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
