Fix expectation for fast/dynamic/window-resize-scrollbars-test.html

According to the flakiness dashboard the test is no longer timing out,
but often failing. Fix the expectation.

Tbr: bokan@chromium.org
Bug: 1130876, 919789
No-Try: true
Change-Id: Iab3443121eb7afd89f34eaa35a7af921170c2c0f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2428498Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810510}

third_party/blink/web_tests/TestExpectations

@@ -5601,7 +5601,7 @@ crbug.com/919789 fast/autoresize/basic.html [ Pass Timeout ]
 crbug.com/919789 fast/dom/viewport/resize-event-fired-window-resized.html [ Pass Timeout ]
 crbug.com/919789 fast/dom/Window/window-resize-contents.html [ Pass Timeout ]
 crbug.com/1021627 fast/dom/rtl-scroll-to-leftmost-and-resize.html [ Pass Failure Timeout ]
-crbug.com/919789 fast/dynamic/window-resize-scrollbars-test.html [ Pass Timeout ]
+crbug.com/1130876 fast/dynamic/window-resize-scrollbars-test.html [ Pass Failure ]
 crbug.com/919789 fast/events/resize-events-count.html [ Pass Timeout ]
 crbug.com/919789 fast/css-grid-layout/flex-content-sized-columns-resize-expected.html [ Pass Timeout ]
 crbug.com/919789 virtual/text-antialias/line-break-between-text-nodes-with-inline-blocks.html [ Pass Timeout ]