tree 39bc0880ecf3691230e2820961a771acda25c54e
parent 3f8c4164067e0239c7f1cdd020d397ce42a9e641
author Howard Chen <howardsoc@google.com> 1508477676 +0800
committer Howard Chen <howardsoc@google.com> 1508817156 +0800

Add header guard to mapping.h

Test: compile goog/master
Change-Id: I88ace1624463e79be416cb0c7e9c7f7d6fd20f0c