Revert "Test Runner: Pick single/multi-process mode automatically." This reverts commit 573d7f34a462fa5b2ca767dd84773ae6fa460d8a. Reason for revert: Breaking ANGLE roll. No-try: true Original change's description: > Test Runner: Pick single/multi-process mode automatically. > > This enables multi-process when running with more than one test > config. This saves developers from remembering to add the arg. > It can also simplify our test configurations by allowing us to omit > the default arguments. On Android by default we stay with single > process. It also changes the --bot-mode flag into --single-process > and --multi-process which override the default behaviour. > > Bug: angleproject:5585 > Change-Id: I3dd885a8a8e6604c224693c546ff5d15224e016e > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2664246 > Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> > Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> > Reviewed-by: Kenneth Russell <kbr@chromium.org> > Commit-Queue: Jamie Madill <jmadill@chromium.org> TBR=kbr@chromium.org,syoussefi@chromium.org,jonahr@google.com,jmadill@chromium.org,jonahr@chromium.org # Not skipping CQ checks because original CL landed > 1 day ago. Bug: angleproject:5585 Change-Id: I11ee1034c301aa246c4b03e29ff9b56235a1005c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2676247 Reviewed-by: Jamie Madill <jmadill@chromium.org>