Don't include windows.h on non-windows systems. Change-Id: I8cf650073ead5b52bac44e31c8c3c894bc31e01c Reviewed-on: https://chromium-review.googlesource.com/182320 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>