Disable browse:news:cnn:2020 on linux-perf for v8.browser stories.

This has increased to a 7% flaky rate so disable for now.

Bug: 1104211
Change-Id: Ie2413d02e00675892ee8956ac411b426773c3c77
No-Try: True
TBR: johnchen@chromium.org
CC: mythria@chromium.org,tmrts@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2426487Reviewed-by: Stephen Nusko <nuskos@chromium.org>
Commit-Queue: Stephen Nusko <nuskos@chromium.org>
Auto-Submit: Stephen Nusko <nuskos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809797}

tools/perf/expectations.config

@@ -403,6 +403,7 @@ crbug.com/1100138 [ desktop ] v8.browsing_desktop/browse:tools:gmail-labelclick:
 crbug.com/1100138 [ desktop ] v8.browsing_desktop/browse:tools:gmail-openconversation:2020 [ skip ]
 crbug.com/1100138 [ desktop ] v8.browsing_desktop/browse:tools:gmail-search:2020 [ skip ]
 crbug.com/1104211 [ win ] v8.browsing_desktop/browse:news:cnn:2020 [ skip ]
+crbug.com/1104211 [ linux ] v8.browsing_desktop/browse:news:cnn:2020 [ skip ]
 crbug.com/1105592 [ desktop ] v8.browsing_desktop/browse:news:nytimes:2020 [ skip ]
 
 # Benchmark v8.browsing_desktop-future
@@ -420,6 +421,7 @@ crbug.com/1100138 [ desktop ] v8.browsing_desktop-future/browse:tools:gmail-labe
 crbug.com/1100138 [ desktop ] v8.browsing_desktop-future/browse:tools:gmail-openconversation:2020 [ skip ]
 crbug.com/1100138 [ desktop ] v8.browsing_desktop-future/browse:tools:gmail-search:2020 [ skip ]
 crbug.com/1104211 [ win ] v8.browsing_desktop-future/browse:news:cnn:2020 [ skip ]
+crbug.com/1104211 [ desktop ] v8.browsing_desktop-future/browse:news:cnn:2020 [ skip ]
 crbug.com/1105592 [ desktop ] v8.browsing_desktop-future/browse:news:nytimes:2020 [ skip ]
 
 # Benchmark: v8.browsing_mobile