Due to a missing comma the kResourceTypeNames array contained a single
long (concatenated) string instead of NumResourceTypes independent
strings.

This incorrect initialization caused a crash in out-of-memory
situations, but this was only noticed on VC++ 2017 for some reason.

This fix adds the missing comma and uses a static_assert to ensure that
the array is initialized correctly.

BUG=chromium:727671,728226,731089

Change-Id: I9f0f3d3725b9f773505506513afb6c349db3a7fb
Reviewed-on: https://chromium-review.googlesource.com/539536Reviewed-by: Jamie Madill <jmadill@chromium.org>