Enable MSVS warning 4530. This forces us to not use exceptions when they aren't enabled. Change-Id: I6abaf08ca4c275bd2fa0625905fd1de3448237ce Reviewed-on: https://chromium-review.googlesource.com/250901 Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Nico Weber <thakis@chromium.org>