Disable system_health.common_desktop/load:media:9gag on win 7 nvidia GPU perf

NOTRY=true
TBR=crouleau@chromium.org
CC=charliea@chromium.org,sullivan@chromium.org,tdresser@chromium.org,chrome-speed-metrics-dev@chromium.org
BUG=1050068

Change-Id: I4a52a8f9596cc7c532ab7cac52b1f3886025b1de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2043815Reviewed-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@{#739429}

tools/perf/expectations.config

@@ -299,6 +299,7 @@ crbug.com/1008001 [ win ] system_health.common_desktop/browse:tools:sheets:2019
 crbug.com/1017244 [ desktop ] system_health.common_desktop/browse_accessibility:media:youtube [ Skip ]
 crbug.com/1023366 [ desktop ] system_health.common_desktop/browse:media:youtube:2019 [ Skip ]
 crbug.com/1042632 [ win ] system_health.common_desktop/load:tools:gmail:2019 [ Skip ]
+crbug.com/1050068 [ win7 ] system_health.common_desktop/load:media:9gag [ Skip ]
 
 
 # Benchmark: system_health.common_mobile