Disable v8.browsing_mobile/browse:social:facebook:2019

This test often hangs - example: https://chrome-isolated.appspot.com/browse?namespace=default-gzip&digest=6456ceb55e1bef585b6be013c8a1c546a16e6313&as=benchmark_log.txt

Bug: chromium:1139057
Change-Id: I0169e3f746f7ec797e00f13c09491865eabaf188
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2485558Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Ryan Heise <heiserya@google.com>
Auto-Submit: Ryan Heise <heiserya@google.com>
Cr-Commit-Position: refs/heads/master@{#818641}

tools/perf/expectations.config

@@ -432,6 +432,7 @@ crbug.com/1039801 [ android-go ] v8.browsing_mobile/browse:social:pinterest_infi
 crbug.com/1064284 [ android-pixel-2 ] v8.browsing_mobile/browse:social:pinterest_infinite_scroll:2019 [ Skip ]
 crbug.com/1088419 [ android-nexus-5x android-webview ] v8.browsing_mobile/browse:media:imgur:2019 [ Skip ]
 crbug.com/1112337 [ android ] v8.browsing_mobile/browse:news:cricbuzz:2019 [ Skip ]
+crbug.com/1139057 [ mobile ] v8.browsing_mobile/browse:social:facebook:2019 [ Skip ]
 
 # Benchmark: v8.browsing_mobile-future
 crbug.com/1036141 [ android-webview ] v8.browsing_mobile-future/browse:shopping:lazada:2019 [ Skip ]