Update the PerformanceManager watchlist

Change-Id: I1878099286948f968e39f27cf808dcf69960b152
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1864623
Commit-Queue: Sébastien Marchand <sebmarchand@chromium.org>
Commit-Queue: Patrick Monette <pmonette@chromium.org>
Auto-Submit: Sébastien Marchand <sebmarchand@chromium.org>
Reviewed-by: Patrick Monette <pmonette@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707087}

WATCHLISTS

@@ -722,7 +722,10 @@
                   '|services/resource_coordinator/',
     },
     'chrome_performance_manager': {
-      'filepath': 'chrome/browser/performance_manager/',
+      'filepath': 'chrome/browser/performance_manager/'\
+                  '|chrome/common/performance_manager/'\
+                  '|chrome/renderer/performance_manager/'\
+                  '|components/performance_manager/',
     },
     'chromecast': {
       'filepath': 'chromecast/',