Add DIR_METADATA files to //tools

Generate DIR_METADATA files and remove metatada from OWNERS files for //tools.

Bug: 1113033
Change-Id: I4ee4da92c3c51ad639a17c96265ab34c1fd94944
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2450742
Reviewed-by: Dirk Pranke <dpranke@google.com>
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814250}
GitOrigin-RevId: 5b9ef558f7d2260c2133287c0254ad286e2afe86
2 files changed