WATCHLISTS: Add chrome_device_policy.proto

TBR=pmarko@chromium.org
BUG=None

Change-Id: I76636c02a65c06286ddbadbc2c7ff292ded8e674
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1563999Reviewed-by: Lutz Justen <ljusten@chromium.org>
Commit-Queue: Lutz Justen <ljusten@chromium.org>
Cr-Commit-Position: refs/heads/master@{#649879}

WATCHLISTS

@@ -728,6 +728,9 @@
                   'chromeos/services/cellular_setup/|'\
                   'ui/webui/resources/cr_components/chromeos/cellular_setup/',
     },
+    'chromeos_device_policy': {
+      'filepath': 'components/policy/proto/chrome_device_policy.proto'
+    },
     'chromeos_geolocation': {
       'filepath': 'chromeos/geolocation/',
     },
@@ -2137,6 +2140,7 @@
     'chromeos_calculator': ['dharcourt@chromium.org'],
     'chromeos_cellular': ['azeemarshad+watch-cellular@chromium.org',
                           'khorimoto+watch-cellular@chromium.org'],
+    'chromeos_device_policy': ['ljusten+watch@chromium.org'],
     'chromeos_geolocation': ['alemate+watch@chromium.org'],
     'chromeos_lkgm': ['achuith+watch@chromium.org',
                       'bpastene+watch@chromium.org',