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.

Please review and LGTM before July 16th or the CL will be
submitted as-is.

NOTRY=true

Bug: 977050
Change-Id: I9a24112403d29fa8d81dfdc03a5851679e539799
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1700620
Commit-Queue: Eric Foo <efoo@chromium.org>
Auto-Submit: Eric Foo <efoo@chromium.org>
Reviewed-by: Yoshiki Iguchi <yoshiki@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#680299}

chrome/browser/drive/OWNERS

@@ -4,3 +4,4 @@ hidehiko@chromium.org
 hirono@chromium.org
 kinaba@chromium.org
 yoshiki@chromium.org
+# COMPONENT: Platform>Apps>FileManager

components/metrics/OWNERS

@@ -5,3 +5,4 @@ per-file BUILD.gn=wittman@chromium.org
 per-file DEPS=wittman@chromium.org
 
 # COMPONENT: Internals>Metrics
+# TEAM: chromium-dev@chromium.org

ios/web/OWNERS

@@ -4,3 +4,4 @@ marq@chromium.org
 
 # TEAM: ios-directory-owners@chromium.org
 # OS: iOS
+# COMPONENT: Mobile>iOSWeb