Revert "Call XSync in the GLX EGL impl if we have a new X server connection" broke linux builders This reverts commit cedb8ca27f97d3101a22f586671a4668bf09bbec. Change-Id: I57143ec207b454bce7498a4d33f6d54464b55ab8 Reviewed-on: https://chromium-review.googlesource.com/271424 Reviewed-by: Zhenyao Mo <zmo@chromium.org> Tested-by: Zhenyao Mo <zmo@chromium.org>