Add a WGL Surface implementation that renders to a DXGI swap chain. This avoids sandbox issues when calling SetPixelFormat on windows from other processes while in a sandboxed process. BUG=540829 Change-Id: I012168531d8c2e5b189671533cea9f57ec713538 Reviewed-on: https://chromium-review.googlesource.com/296340 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Tryjob-Request: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>