This change saves about 100KB on Android

Bug: angleproject:5490
Change-Id: Ieca0e597423f74a917197f381560af5409a9e874
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2601341Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Peng Huang <penghuang@chromium.org>