We cannot guarantee that a shader with more instructions will
always take more time than a smaller shader.

Bug: angleproject:5178
Change-Id: Icf48a7b73ad482237cf3161667d75a25e36dd643
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2479682Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>