libchrome: add base/functional/* headers am: 57f727b567

Original change: https://android-review.googlesource.com/c/platform/external/libchrome/+/2399915

Change-Id: I0f5e0482396a8ee8206cb88ec21fe3322820e7be
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>