Shaves about 40KB from binary size.

Bug: angleproject:2022
Bug: angleproject:3432
Change-Id: I008c18e0040b1bafe022087113681e2ace6eb7b8
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1616963
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>