[DirectoryOwnership] Add TEAM/COMPONENT into OWNERS files.

testing/buildbot/OWNERS

 # This is reserved for people that are comfortably with buildbot recipes
 # and understand the implications of changing these files.
 
 dpranke@chromium.org
 jam@chromium.org
 jochen@chromium.org
 kbr@chromium.org
 machenbach@chromium.org
 maruel@chromium.org
 phajdan.jr@chromium.org
 sky@chromium.org
 stip@chromium.org
 thakis@chromium.org
 
 per-file chromium.android*.json=bpastene@chromium.org
 per-file chromium.android*.json=jbudorick@chromium.org
 
 # For Site Isolation FYI tests:
 per-file chromium.fyi.json=creis@chromium.org
 per-file chromium.fyi.json=nick@chromium.org
 
 per-file *chromium.perf*.json=dtu@chromium.org
 per-file *chromium.perf*.json=eyaich@chromium.org
 per-file chromium.perf.json=eakuefner@chromium.org
 per-file chromium.perf.json=fmeawad@chromium.org
 per-file chromium.perf.json=simonhatch@chromium.org
 per-file chromium.perf.json=sullivan@chromium.org
 per-file chromium.webrtc.json=kjellander@chromium.org
 per-file chromium.webrtc.fyi.json=kjellander@chromium.org
+
+# COMPONENT: Infra>Platform>Buildbot

[Michael Achenbach, 2017/02/24 09:02:01]

I don't think Infra>Platform>Buildbot is appropriate here. The files here are
mostly defining what we test and how. The chosen component is for how buildbot
works in general.

@dpranke,phajdan: Do you know a better component for this?

[Dirk Pranke, 2017/02/24 21:57:09]

I'd use Infra>Client.

[ymzhang1, 2017/02/24 22:02:53]

Done.