move duplicated SwapControlData to rendergl_utils. Both DisplayOzone and DisplayGLX have SwapControlData declared and defined. In the future, when both of them will be compiled (DisplayGLX will be required for Ozone/X11), they will result in a compilation error stating about multiple definitions of the struct. Thus, move that rendergl_utils. Bug: chromium:1084458 Change-Id: Ib174d0e8de1ac4773c841fe286175358acb15d79 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2210702 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>