Use nullptr instead of NULL to satisfy MSVC. Sigh.
Use nullptr instead of NULL to satisfy MSVC. Sigh.

Change-Id: Ifb46bfd0e2f9713e6b12c4ed39391afaf4dddfd3
Reviewed-on: https://code-review.googlesource.com/13972
Reviewed-by: Paul Wankadia <62d4e38bb1380f055ec4b899baa75e52af09c5f7@google.com>

google/re2,google/re2,google/re2,google/re2,google/re2