Revert "Revert "WindowSurfaceCGL: unregister the SwapLayer on destruction"" This reverts commit 10277159570e987a02a112fa994a4b82845786d3. Change-Id: I9ecf977845c6ee01d7c3e3791c23673407cfb91a Reviewed-on: https://chromium-review.googlesource.com/322213 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Tested-by: Corentin Wallez <cwallez@chromium.org>