MiracleParameter: Make thread cache purging parameter configurable

As part of the MiracleParameter project[1], we are making this
parameter configurable for tuning.

[1]: https://docs.google.com/document/d/1wnAJuh68uyBleTUVadrUtZmkdTyz1eKWC1i6TPrx4f4/

Bug: 1475915
Change-Id: Iedcf997bf605c297a17de16c9ed806bbe8ac7f26
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4840364
Reviewed-by: Minoru Chikamune <chikamune@chromium.org>
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Reviewed-by: Bartek Nowierski <bartekn@chromium.org>
Commit-Queue: Mingyu Lei <leimy@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1193442}


CrOS-Libchrome-Original-Commit: af2e0d9bc55c779c8a9f0702b485d618d91edecc
6 files changed
tree: 6385bd53ca93bd434b03f0031ebacebef14a1914
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/