Disable blink_perf.paint/paint-offset-changes.html on WebView

NOTRY=true
TBR=perezju@chromium.org
CC=wangxianzhu@chromium.org
BUG=859979

Change-Id: Iaf61159ca9115ecced3c1598fd1934bae54461de
Reviewed-on: https://chromium-review.googlesource.com/1125059Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Commit-Queue: Sami Kyöstilä <skyostil@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572530}

tools/perf/expectations.config

@@ -42,6 +42,7 @@ crbug.com/839494 [ Android_One ] 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/799540 [ Nexus_7 ] blink_perf.paint/* [ Skip ]
+crbug.com/859979 [ Android_Webview ] blink_perf.paint/paint-offset-changes.html [ Skip ]
 
 # Benchmark: blink_perf.parser
 crbug.com/796115 [ Android_One ] blink_perf.parser/html5-full-render.html [ Skip ]