libchrome: alias base::Optional to absl::optional

Cherry-pick of crrev.com/c/2892208.
For migrating to absl::optional in other packages.

BUG=b:190446478
TEST=./build_packages --board=hatch
TEST=CQ

Change-Id: Ia6be3e8edb02ac6a95a4d7370165945ac35ad183
Reviewed-on: https://chromium-review.googlesource.com/c/aosp/platform/external/libchrome/+/2966213
Reviewed-by: Qijiang Fan <[email protected]>
Commit-Queue: Grace Cham <[email protected]>
Tested-by: Grace Cham <[email protected]>
2 files changed
tree: d3cf2a560ad7cb1fcaab8a3bbca48e336732ffb9
  1. base/
  2. build/
  3. components/
  4. crypto/
  5. dbus/
  6. device/
  7. ipc/
  8. libchrome_tools/
  9. mojo/
  10. soong/
  11. testing/
  12. third_party/
  13. ui/
  14. .gitignore
  15. Android.bp
  16. BASE_VER
  17. BUILD.gn
  18. BUILD.IGNORE
  19. MODULE_LICENSE_BSD
  20. NOTICE
  21. OWNERS
  22. PRESUBMIT.cfg
  23. README.md
  24. testrunner.cc
  25. unblocked_terms.txt
README.md

libchrome

Overview

This directory includes the source from Chrome's libbase for use in Chrome OS.

See libchrome.md for more info.