Add watch list for compositor animator

Bug:

Change-Id: Ie49fde45c2efc4c70fbfa8e99841541064e7540d
Reviewed-on: https://chromium-review.googlesource.com/c/1395158Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619821}

WATCHLISTS

@@ -779,6 +779,9 @@
     'components_deps': {
       'filepath': 'components/([^/]*/)*DEPS',
     },
+    'compositor_animator': {
+      'filepath': 'chrome/android/java/src/org/chromium/chrome/browser/compositor/animation/',
+    },
     'content_bluetooth': {
       'filepath': 'content/.*bluetooth'
     },
@@ -2149,6 +2152,7 @@
     'components_deps': ['blundell+watchlist@chromium.org',
                         'droger+watchlist@chromium.org',
                         'sdefresne+watchlist@chromium.org'],
+    'compositor_animator': ['mdjones+watch@chromium.org'],
     'content_bluetooth': ['mattreynolds+watch@chromium.org',
                           'ortuno+watch@chromium.org'],
     'content_loader': ['loading-reviews@chromium.org'],