sheriff: mark flex-content-sized-columns-resize on Mac

Bug: 1045599
Change-Id: I16989fc6b238d52f111a91dc8a397df2c7de20fd
Tbr: kschmi@microsoft.com
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2426998Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809981}

third_party/blink/web_tests/TestExpectations

@@ -5591,7 +5591,6 @@ 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/919789 fast/events/resize-events-count.html [ Pass Timeout ]
-crbug.com/919789 fast/css-grid-layout/flex-content-sized-columns-resize.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 ]
 crbug.com/919789 images/image-click-scale-restore-zoomed-image.html [ Pass Timeout ]
@@ -6753,3 +6752,4 @@ crbug.com/1131551 compositing/transitions/transform-on-large-layer.html [ Pass F
 crbug.com/1057060 virtual/compositor-threaded-percent-based-scrolling/fast/scrolling/scrollbars/mouse-autoscrolling-on-scrollbar.html [ Pass Failure Timeout ]
 crbug.com/1057060 virtual/threaded-prefer-compositing/fast/scrolling/scrollbars/mouse-autoscrolling-on-scrollbar.html [ Pass Failure Timeout ]
 crbug.com/1057060 virtual/scroll-unification/fast/scrolling/scrollbars/mouse-autoscrolling-on-scrollbar.html [ Pass Failure Timeout ]
+crbug.com/1045599 fast/css-grid-layout/flex-content-sized-columns-resize.html [ Pass Failure Timeout ]