Add wfh to watchlist for plugin metadata

Change-Id: Ibb6f8213ef0892885cdcad3a3dd4d04e111a1edd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2535797Reviewed-by: Alex Gough <ajgo@chromium.org>
Commit-Queue: Will Harris <wfh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827024}

WATCHLISTS

@@ -1570,6 +1570,9 @@
     'picture_in_picture': {
       'filepath': 'third_party/blink/renderer/modules/picture_in_picture/'
     },
+    'plugin_metadata': {
+      'filepath': 'chrome/browser/resources/plugin_metadata/'
+    },
     'polymer': {
       'filepath': 'third_party/polymer/|'\
                   'third_party/web-animations-js/|'\
@@ -2712,6 +2715,7 @@
                  'khorimoto+watch-phonehub@chromium.org',
                  'themaxli+watch-phonehub@chromium.org'],
     'picture_in_picture': ['beaufort.francois+pip@gmail.com'],
+    'plugin_metadata': ['wfh+watch@chromium.org'],
     'polymer': ['michaelpg+watch-polymer@chromium.org'],
     'popup_blocker': ['csharrison+watch-popups@chromium.org'],
     'precache': ['wifiprefetch-reviews@google.com'],