This was missing from change:
"ShaderVariable: separate fields for staticUse and active"

BUG=angleproject:2262

Change-Id: I521e9f9a536756d7d8163220c1d56885308272a1
Reviewed-on: https://chromium-review.googlesource.com/978203Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>