Disable failing blink_perf collapsed-border tests on Nexus6_Webview

NOTRY=true
TBR=nednguyen@google.com
CC=wangxianzhu@chromium.org

Bug: 901493
Change-Id: Iec05bec384214b2e3aa0fad1ea00687c57636f96
Reviewed-on: https://chromium-review.googlesource.com/c/1316407Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Commit-Queue: Caleb Rouleau <crouleau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605065}

tools/perf/expectations.config

@@ -42,6 +42,9 @@ crbug.com/832686 [ Nexus_5 ] blink_perf.layout/subtree-detaching.html [ Skip ]
 crbug.com/574483 [ Android_Svelte ] blink_perf.paint/* [ Skip ]
 crbug.com/799540 [ Nexus_5 ] blink_perf.paint/* [ Skip ]
 crbug.com/859979 [ Android_Webview ] blink_perf.paint/paint-offset-changes.html [ Skip ]
+crbug.com/901493 [ Nexus6_Webview ] blink_perf.paint/large-table-background-change-with-visible-collapsed-borders.html [ Skip ]
+crbug.com/901493 [ Nexus6_Webview ] blink_perf.paint/large-table-collapsed-border-change-with-backgrounds.html [ Skip ]
+crbug.com/901493 [ Nexus6_Webview ] blink_perf.paint/large-table-collapsed-border-change-with-text.html [ Skip ]
 
 # Benchmark: blink_perf.shadow_dom
 crbug.com/702319 [ Nexus_5X ] blink_perf.shadow_dom/* [ Skip ]