This code is easily accessible from the translator, with the proper
export calls. This facilitates adding a common static library, since
this code calls some methods in translator.

BUG=angle:773

Change-Id: I0c50098ec3f67c2df7749b3c2518be0a9fd939e2
Reviewed-on: https://chromium-review.googlesource.com/240093Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>