DisplayGLX: disable the GLES backend on Intel and NVIDIA
DisplayGLX: disable the GLES backend on Intel and NVIDIA

This is to fix failures in the automated testing while we work on them.

BUG=angleproject:1303

Change-Id: I0813b5cf1dca1e329504704c70b9d2b0c34d003b
Reviewed-on: https://chromium-review.googlesource.com/324460
Reviewed-by: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>
Commit-Queue: Corentin Wallez <470c533e86f4f848c98c7e11fffc2d043494a401@chromium.org>
Tested-by: Corentin Wallez <470c533e86f4f848c98c7e11fffc2d043494a401@chromium.org>

ppy/angle,ecoal95/angle,ppy/angle,ecoal95/angle,ecoal95/angle,mikolalysenko/angle,ecoal95/angle,MSOpenTech/angle,ecoal95/angle,mlfarrell/angle,MSOpenTech/angle,domokit/waterfall,mlfarrell/angle,MSOpenTech/angle,domokit/waterfall,MSOpenTech/angle,ppy/angle,mlfarrell/angle,mikolalysenko/angle,mikolalysenko/angle,mikolalysenko/angle,mlfarrell/angle,ppy/angle