Update gesture-pinch-zoom-prevent-in-handler.html slimming-paint-v2 expectation

As with gesture-pinch-zoom-scroll-bubble.html, it can fail as well as
crash.

Bug: 787924
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: Ib8adbfaed9a25c49026d1c969f81b49b62c29c14
Reviewed-on: https://chromium-review.googlesource.com/1062214Reviewed-by: David Bokan <bokan@chromium.org>
Commit-Queue: Kevin McNee <mcnee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559521}

third_party/WebKit/LayoutTests/FlagExpectations/enable-slimming-paint-v2

@@ -1038,7 +1038,7 @@ crbug.com/667946 fast/compositor-wheel-scroll-latching/animated-scroll/touchpad-
 # virtual/threaded variants of sub-directories and tests already skipped or marked as failing above.
 Bug(none) virtual/threaded/http/tests/devtools/ [ Skip ]
 Bug(none) virtual/threaded/fast/events/pinch/gesture-pinch-zoom-scroll-bubble.html [ Failure Crash ]
-Bug(none) virtual/threaded/fast/events/pinch/gesture-pinch-zoom-prevent-in-handler.html [ Crash ]
+Bug(none) virtual/threaded/fast/events/pinch/gesture-pinch-zoom-prevent-in-handler.html [ Failure Crash ]
 Bug(none) virtual/threaded/fast/events/pointerevents/pinch/pointerevent_touch-action-pinch_zoom_touch.html [ Pass Failure ]
 Bug(none) virtual/threaded/fast/scroll-behavior/ [ Skip ]
 Bug(none) virtual/threaded/compositing/visibility/layer-visible-content.html [ Failure ]