Revert "Disable TextureFunctionTest.NonConstantOffset on win gpu fyi bots for a bit."

This reverts commit 82efddec47061c7136b4fe76294be31a2cfb1a95.

Reason for revert: Latest run of angle_unittests on Win10 FYI Debug (NVIDIA) is green:
https://ci.chromium.org/p/chromium/builders/ci/Win10%20FYI%20Debug%20%28NVIDIA%29/3076

Original change's description:
> Disable TextureFunctionTest.NonConstantOffset on win gpu fyi bots for a bit.
> 
> Bug: 943140
> Change-Id: I0ba9ef377ced18e5ccce6d0eabe86fae63be8a15
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1529180
> Commit-Queue: Nico Weber <thakis@chromium.org>
> Commit-Queue: Alexander Hendrich <hendrich@chromium.org>
> Auto-Submit: Nico Weber <thakis@chromium.org>
> Reviewed-by: Alexander Hendrich <hendrich@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#641928}

TBR=thakis@chromium.org,hendrich@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 943140
Change-Id: I8eec88f1fa1ce6c14779a5f5e51dc6395ae3f416
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1534998
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#643403}
3 files changed