Mark http/tests/devtools/animation/animation-transition-setTiming-crash.js as flaky

Bug: 935027
No-try: True
No-presubmit: True
Change-Id: Ib8df01b072da8083da492538f3ef232a45fed004
Reviewed-on: https://chromium-review.googlesource.com/c/1484858Reviewed-by: Kristi Park <kristipark@chromium.org>
Commit-Queue: Kristi Park <kristipark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#634910}

third_party/blink/web_tests/TestExpectations

@@ -6020,6 +6020,7 @@ crbug.com/934768 [ Mac ] http/tests/devtools/tracing/worker-events.js [ Failure
 crbug.com/934768 [ Mac ] virtual/threaded/http/tests/devtools/tracing/worker-events.js [ Failure Pass ]
 crbug.com/934818 [ Mac Debug ] virtual/threaded/http/tests/devtools/tracing/decode-resize.js [ Failure Pass ]
 crbug.com/934866 [ Mac ] virtual/outofblink-cors-ns/http/tests/security/cross-origin-worker-indexeddb-allowed.html [ Crash Pass ]
+crbug.com/935027 http/tests/devtools/animation/animation-transition-setTiming-crash.js [ Failure Pass ]
 
 # Device Sensor Events are being restricted to secure browsing contexts, but the change is still gated on a runtime flag.
 crbug.com/932078 http/tests/security/powerfulFeatureRestrictions/device-orientation-future-behavior-on-insecure-origin.html [ Skip ]