tree 780e8a2b0a2a0022b3bf27ed8658266e6482dd68
parent 5f976149d8da6a6f4d3714a0aace93a049e4f7f9
author Kurt Alfred Kluever <kak@google.com> 1525144603 -0700
committer Jonathan Nieder <jrn@google.com> 1525145793 -0700

Use ConcurrentHashMap directly instead of MapMaker.

PiperOrigin-RevId: 194887386
Change-Id: I9a6ad3f6f8cbdd2c3f878e29db43ad2270100818