The tests meant to do getClientMajorVersion() >= 3, but in a few
locations accidentally did > 3.

Bug: angleproject:3569
Change-Id: Ie69898348982c6aae7dac265a18229c257dbfbda
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1947458Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>