Mark interleaved-cursors-large.html as flaky timeout

TBR=pwnall@chromium.org

No-Try: true
Bug: 937170
Change-Id: I6fdb63366939b9a027d327491da61cbda90e7205
Reviewed-on: https://chromium-review.googlesource.com/c/1496880Reviewed-by: Marc Treib <treib@chromium.org>
Commit-Queue: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636808}

third_party/blink/web_tests/TestExpectations

@@ -3175,7 +3175,6 @@ crbug.com/626703 external/wpt/css/css-text/writing-system/writing-system-segment
 crbug.com/626703 external/wpt/css/css-text/writing-system/writing-system-line-break-001.html [ Failure ]
 crbug.com/626703 external/wpt/css/css-text/writing-system/writing-system-line-break-002.html [ Failure ]
 crbug.com/626703 external/wpt/css/css-text/writing-system/writing-system-text-transform-001.html [ Failure ]
-crbug.com/626703 [ Win7 ] external/wpt/IndexedDB/interleaved-cursors-large.html [ Crash ]
 crbug.com/903383 external/wpt/css/filter-effects/filter-cb-abspos-inline-003.html [ Failure ]
 crbug.com/903383 external/wpt/css/filter-effects/css-filters-animation-combined-001.html [ Failure ]
 crbug.com/903383 external/wpt/css/filter-effects/css-filters-animation-blur.html [ Failure ]
@@ -5962,3 +5961,4 @@ crbug.com/915352 [ Mac10.10 Mac10.11 ] virtual/threaded/external/wpt/animation-w
 # Sheriff 2019-03-01
 crbug.com/937215 [ Linux ] media/controls/modern/doubletap-to-jump-forwards.html [ Pass Failure ]
 crbug.com/937215 [ Linux ] virtual/video-surface-layer/media/controls/modern/doubletap-to-jump-forwards.html [ Pass Failure ]
+crbug.com/937170 [ Linux Win7 ] external/wpt/IndexedDB/interleaved-cursors-large.html [ Pass Timeout Crash ]