GitLab

- Fix DCHECK: is_running_xxx_animation_on_compositor should not be set
  in non-BGPT mode. The DCHECK is to check if the flag is set, we must
  have CompositingReason::kActiveXXXAnimation in
  direct_compositing_reasons (which is not set in non-BGPT).

- Add virtual/disable-blink-gen-property-trees/animations to avoid
  regressions in non-BGPT mode when we make animation changes.
  The virtual suite is run with --enable-threaded-compositing which is
  closer to real world.

Bug: 836884
Change-Id: I2f88db3423a9938cb55ce91244735b3881d31a7c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1507044
Commit-Queue: Philip Rogers <pdr@chromium.org>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638601}