Replace a lot of code with one function that can do all the tests and
do them with any divisor and number of instances.

BUG=angleproject:2672

Change-Id: I4f7f59d17dad234c524e485d9baa3117fcbb57bd
Reviewed-on: https://chromium-review.googlesource.com/c/1330309
Commit-Queue: Frank Henigman <fjhenigman@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>