This removes a static global map initialization.

BUG=angleproject:1389
BUG=angleproject:1459

Change-Id: I6eb19f6649280e72682c6806ea0bf6eb70173984
Reviewed-on: https://chromium-review.googlesource.com/405487Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>