GitLab

Change RunFor() to execute a near-future frame, and a frame at the final time
if needed.  If we ever actually need all the intermedate frames, the tests that
need those frames should simulate them.  Our UI should generally never need
this.

BUG=
R=vollick

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_vr;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: Idf87a0fd524b6a6dcce06382cab96670a4f1e2dd
Reviewed-on: https://chromium-review.googlesource.com/986619Reviewed-by: Ian Vollick <vollick@chromium.org>
Commit-Queue: Christopher Grant <cjgrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547713}