This adds a CheckVkSuccess utility function that adds the VkResult value
to the context lost error message.
Also adds a small fix to dawn_native/Error.h interoperability between
MaybeError and ResultOrError<NonPointer> with tests.
BUG=chromium:917555
BUG=dawn:79
Change-Id: Icc01122d62d83693fc0ea3f26b272f2372fd3087
Reviewed-on: https://dawn-review.googlesource.com/c/3623
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
