Disable loading.desktop/AllRecipes_cold on Win 7 too

It was already disabled on Win 10, but it was failing on Win 7 also.

TBR=sullivan@chromium.org
CC=kouhei@chromium.org, ksakamoto@chromium.org
NOTRY=true

Bug: 879833
Change-Id: I926a38ef6713a0eaec1eebae71948e6dcc9d49b7
Reviewed-on: https://chromium-review.googlesource.com/1219966Reviewed-by: Charlie Andrews <charliea@chromium.org>
Commit-Queue: Charlie Andrews <charliea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590321}

tools/perf/expectations.config

@@ -67,7 +67,7 @@ crbug.com/876636 [ ChromeOS ] loading.desktop/TheOnion_warm [ Skip ]
 crbug.com/876636 [ Win_10 ] loading.desktop/TheOnion_warm [ Skip ]
 crbug.com/876636 [ ChromeOS ] loading.desktop/AllRecipes_warm [ Skip ]
 crbug.com/879833 [ Mac_10.12 ] loading.desktop/AllRecipes_cold [ Skip ]
-crbug.com/879833 [ Win_10 ] loading.desktop/AllRecipes_cold [ Skip ]
+crbug.com/879833 [ Win ] loading.desktop/AllRecipes_cold [ Skip ]
 
 # Benchmark: loading.mobile
 crbug.com/656861 [ All ] loading.mobile/G1 [ Skip ]