CommandLineFlags::StringArray: Add method parseAndValidate().

See follow-up CL for an example use: https://skia-review.googlesource.com/c/skia/+/734379.

Bug: b/40045301
Change-Id: I51998f2eff055c9e8b440c51398e8a2fb956c903
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/736364
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Leandro Lovisolo <lovisolo@google.com>
1 file changed