Reenable system_health.common_desktop/browse:news:cnn on Win

The benchmark seems to be passing now.

Bug: 853188
Change-Id: I0d502d1210540b8221afd5a90a5c59d63b93c3ad
Reviewed-on: https://chromium-review.googlesource.com/1144123
Commit-Queue: Nicolás Peña Moreno <npm@chromium.org>
Reviewed-by: Annie Sullivan <sullivan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576949}

tools/perf/expectations.config

@@ -239,7 +239,6 @@ crbug.com/822925 [ Android_Webview ] smoothness.tough_pinch_zoom_cases/yahoo_gam
 
 # Benchmark: system_health.common_desktop
 crbug.com/828917 [ Mac ] system_health.common_desktop/multitab:misc:typical24 [ Skip ]
-crbug.com/853188 [ Win ] system_health.common_desktop/browse:news:cnn [ Skip ]
 crbug.com/649392 [ Win ] system_health.common_desktop/play:media:soundcloud [ Skip ]
 crbug.com/649392 [ All ] system_health.common_desktop/play:media:google_play_music [ Skip ]
 crbug.com/773084 [ Mac ] system_health.common_desktop/browse:tools:maps [ Skip ]