Make the EGLDisplay a non-static member of ANGLETest. We would create and destroy the display with every test, as it was not part of the environment. BUG=angle:730 Change-Id: Iae003f13c8e975ae57d3af2d74f9f058a560046f Reviewed-on: https://chromium-review.googlesource.com/213291 Reviewed-by: Brandon Jones <bajones@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>