Disable media/video-aspect-ratio.html for Windows

Disable flaky media/video-aspect-ratio.html blink_web_test due to
failures on Windows.

TBR=chrishtr@chromium.org

Bug: 963141
Change-Id: Icfd109600023f2cb0d5df5ff62e84f747a0e5d3b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2208086Reviewed-by: Thomas Lukaszewicz <tluk@chromium.org>
Commit-Queue: Thomas Lukaszewicz <tluk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#769919}

third_party/blink/web_tests/TestExpectations

@@ -5069,6 +5069,7 @@ crbug.com/963141 media/video-object-fit-change.html [ Pass Failure ]
 crbug.com/963141 [ Mac ] media/controls/video-overlay-cast-light-rendering.html [ Pass Failure ]
 crbug.com/963141 [ Win ] media/controls/video-overlay-cast-light-rendering.html [ Pass Failure ]
 crbug.com/963141 [ Mac ] media/video-aspect-ratio.html [ Pass Failure ]
+crbug.com/963141 [ Win ] media/video-aspect-ratio.html [ Pass Failure ]
 
 # Sheriff 2019-05-16
 crbug.com/963141 [ Linux ] media/video-object-fit.html [ Pass Failure ]