GitLab

- deleted .style.yapf files in subdirs
- added root .style.yapf file
- reformat *.py files

Bug: 1051750
Change-Id: Ia50551d302bff115600bb4e532e29cc9ca5a9d5a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2165727Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#765390}