This reverts commit 10e7e501.

Reason for revert: Possible reason for anglebug.com/2561

Original change's description:
> Don't double-terminate a display.
> 
> Some dEQP tests call eglTerminate twice on the same display and cause crashes.
> 
> BUG=angleproject:2546
> 
> Change-Id: I8a13d00fd03692b3b24dee4813c245d83ea00862
> Reviewed-on: https://chromium-review.googlesource.com/1060335
> Reviewed-by: Corentin Wallez <cwallez@chromium.org>
> Reviewed-by: Geoff Lang <geofflang@chromium.org>
> Commit-Queue: Geoff Lang <geofflang@chromium.org>

TBR=geofflang@chromium.org,jmadill@chromium.org,cwallez@chromium.org

Change-Id: Iab32ed96443eab406afa65642f9a66f68dc8ebcd
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:2546, angleproject:2561
Reviewed-on: https://chromium-review.googlesource.com/1062728Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>