OWNERS files updated with latest COMPONENT and TEAMS.

This is CL is generated by a script. Data is pulled from
review conducted in Q2 2019. See https://tinyurl.com/yxau5sc4
for context.

Bug: 977050
Change-Id: I86a25d42415090528ba4a21821375d7a4d745e54
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1700838
Commit-Queue: Eric Foo <efoo@chromium.org>
Reviewed-by: Eric Foo <efoo@chromium.org>
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Filip Gorski <fgorski@chromium.org>
Auto-Submit: Eric Foo <efoo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#681134}

components/gcm_driver/OWNERS

@@ -5,3 +5,4 @@ peter@chromium.org
 zea@chromium.org
 
 # COMPONENT: Services>CloudMessaging
+# TEAM: platform-capabilities@chromium.org

components/timers/OWNERS

 chirantan@chromium.org
+# COMPONENT: Internals>TaskScheduler

third_party/re2/OWNERS

 mmoroz@chromium.org
 tfarina@chromium.org
 thakis@chromium.org
+# COMPONENT: Internals