GL: DisplayGLX::makeCurrent should handle drawSurface==0 In this case the draw surface should be unbound, but ANGLE had been skipping this case (and handling it internally). This caused a crash on Linux Intel. Now makeCurrent is actually called on the driver with drawSurface mDummyPbuffer. Bug: chromium:988440 Change-Id: Ifae7a828455eb67e516a47515ec6c24cc36e3c2b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1808719 Commit-Queue: Jonah Ryan-Davis <jonahr@google.com> Reviewed-by: Geoff Lang <geofflang@chromium.org>