Causing failures in EGLSurfaceTest.MakeCurrentTwice on Windows

BUG=angleproject:892

This reverts commit 118e7195.

Change-Id: Ifbb17d1c9bc0390abadbfb8f78cf14dbf1bb8e83
Reviewed-on: https://chromium-review.googlesource.com/269950Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>