This removes another static global map initializer.

BUG=angleproject:1389
BUG=angleproject:1459

Change-Id: I302f349ea4e95d079077866a07b0d57758c40892
Reviewed-on: https://chromium-review.googlesource.com/405488
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>