base: Make shared memory backed by Mach primitives by default.

The type of shared memory used is controlled by an A/B experiment. If the
experiment isn't present, use Mach primitives.

BUG=466437

Review URL: https://codereview.chromium.org/1453383002

Cr-Commit-Position: refs/heads/master@{#361249}


CrOS-Libchrome-Original-Commit: 8b8e4212cef52b2cf924c27bb7c49e375306acb3
2 files changed
tree: 5b4a11148ef612804fad6a82edc7bac3747817f6
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/