Mark more virtual/threaded/transitions tests flaky

third_party/WebKit/LayoutTests/TestExpectations

 # ====== Oilpan-only failures from here ======
 # Most of these actually cause the tests to report success, rather than
 # failure. Expected outputs will be adjusted for the better once Oilpan
 # has been well and truly enabled always.
 
 crbug.com/420008 inspector/tracing/worker-js-frames.html [ Pass Timeout Failure ]
 crbug.com/420008 virtual/threaded/inspector/tracing/worker-js-frames.html [ Pass Timeout Failure ]
 crbug.com/596940 inspector-protocol/runtime/runtime-execution-contexts-events.html [ Pass Timeout ]
 crbug.com/597572 [ Debug ] http/tests/inspector/resource-tree/resource-tree-reload.html [ Pass Failure ]
 
@@ skipping 221 matching lines @@
 crbug.com/432129 fast/html/marquee-scroll.html [ Failure Pass ]
 crbug.com/518929 [ Precise Debug ] http/tests/appcache/obsolete-error-events.html [ Failure Pass Timeout ]
 crbug.com/518929 [ Precise Debug ] http/tests/appcache/remove-cache.html [ Failure Pass ]
 crbug.com/248938 virtual/threaded/transitions/cancel-and-start-new.html [ Pass Failure ]
 crbug.com/248938 virtual/threaded/animations/change-keyframes-name.html [ Failure Pass Timeout ]
 crbug.com/248938 virtual/threaded/animations/change-one-anim.html [ Failure Pass ]
 crbug.com/326139 crbug.com/390125 media/video-frame-accurate-seek.html [ Failure Pass ]
 crbug.com/248938 virtual/threaded/animations/3d/transform-origin-vs-functions.html [ Pass Failure ]
 crbug.com/248938 virtual/threaded/transitions/cancel-transition.html [ Pass Failure ]
 crbug.com/248938 virtual/threaded/transitions/extra-transition.html [ Pass Failure ]
+crbug.com/248938 [ Linux ] virtual/threaded/transitions/equivalent-background-image-no-transition.html [ Pass Timeout ]
+crbug.com/248938 [ Linux ] virtual/threaded/transitions/move-after-transition.html [ Pass Timeout ]
 crbug.com/248938 virtual/threaded/transitions/start-transform-transition.html [ Pass Failure ]
 crbug.com/248938 virtual/threaded/animations/animation-direction-normal.html [ Pass Failure Timeout ]
 crbug.com/248938 virtual/threaded/animations/animation-iteration-event-destroy-renderer.html [ Pass Timeout ]
 crbug.com/248938 virtual/threaded/animations/transition-and-animation-3.html [ Pass Timeout ]
 crbug.com/446385 [ Linux Mac ] http/tests/xmlhttprequest/xmlhttprequest-json-response-overflow.html [ Pass Timeout ]
 crbug.com/446385 [ Win7 Debug ] http/tests/xmlhttprequest/xmlhttprequest-json-response-overflow.html [ Crash Pass Timeout ]
 crbug.com/248938 virtual/threaded/transitions/interrupt-transform-transition.html [ Pass Failure ]
 crbug.com/248938 virtual/threaded/animations/dynamic-stylesheet-loading.html [ Pass Failure Timeout ]
 crbug.com/248938 virtual/threaded/transitions/change-duration-during-transition.html [ Pass Failure ]
 crbug.com/248938 [ Win ] virtual/threaded/animations/change-keyframes.html [ Pass Failure ]
 crbug.com/248938 virtual/threaded/transitions/transition-end-event-nested.html [ Pass Failure ]
+crbug.com/248938 [ Mac ] virtual/threaded/transitions/transition-end-event-unprefixed-01.html [ Pass Failure ]
 crbug.com/513143 virtual/threaded/fast/scroll-behavior/subframe-interrupted-scroll.html [ Failure Pass ]
-crbug.com/248938 virtual/threaded/animations/display-none-terminates-animation.html  [ Pass Failure ]
+crbug.com/248938 virtual/threaded/animations/display-none-terminates-animation.html [ Pass Failure ]
 crbug.com/638693 virtual/threaded/animations/display-inline-style-adjust.html [ Pass Crash Failure ]
 crbug.com/421283 fast/html/marquee-scrollamount.html [ Pass Failure ]
 crbug.com/248938 [ Win Debug ] virtual/threaded/animations/delay-start-event.html [ Pass Failure ]
-crbug.com/248938 [ Win Debug ] virtual/threaded/transitions/transition-end-event-transform.html [ Pass Failure ]
+crbug.com/248938 [ Mac Win ] virtual/threaded/transitions/transition-end-event-transform.html [ Pass Failure ]
 crbug.com/248938 [ Linux Win ] virtual/threaded/animations/cascade-important.html [ Pass Timeout ]
 crbug.com/493815 inspector/elements/iframe-load-event.html [ Pass Failure ]
-crbug.com/248938 [ Win Debug ] virtual/threaded/transitions/transition-end-event-multiple-03.html [ Pass Failure ]
+crbug.com/248938 virtual/threaded/transitions/transition-end-event-multiple-03.html [ Pass Failure ]
 crbug.com/248938 [ Win Debug ] virtual/threaded/transitions/transition-end-event-multiple-04.html [ Pass Failure ]
+crbug.com/248938 [ Linux ] virtual/threaded/transitions/transition-end-event-prefixed-01.html [ Pass Timeout ]
 crbug.com/352405 virtual/threaded/animations/transition-and-animation-1.html [ Pass Timeout ]
 crbug.com/248938 virtual/threaded/transitions/transition-end-event-rendering.html [ Pass Timeout ]
+crbug.com/248938 [ Linux ] virtual/threaded/transitions/unprefixed-perspective-origin.html [ Pass Timeout ]
+crbug.com/248938 [ Linux ] virtual/threaded/transitions/transition-not-interpolable.html [ Pass Timeout ]
+crbug.com/248938 [ Mac ] virtual/threaded/transitions/interrupted-all-transition.html [ Pass Failure ]
 
 crbug.com/542541 [ Debug ] fast/events/click-count.html [ Pass Failure ]
 
 # TODO(oshima): Mac Android are currently not supported.
 crbug.com/567837 [ Mac Android ] virtual/scalefactor200withzoom/fast/hidpi/static [ Skip ]
 
 # Mac does not support fractional scale factor.
 crbug.com/567837 [ Mac ] virtual/scalefactor150/fast/hidpi/static [ Skip ]
 
 # TODO(oshima): Move the event scaling code to eventSender and remove this.
@@ skipping 991 matching lines @@
 crbug.com/638618 inspector/editor/text-editor-search-switch-editor.html [ Skip ]
 
 # This test breaks when the feature introduced in the bug is enabled. We keep
 # this tested without the feature by using the virtual test. See
 # virtual/stable/http/tests/navigation/beacon-cross-origin-redirect-blob-expected.txt
 crbug.com/490015 http/tests/navigation/beacon-cross-origin-redirect-blob.html [ Skip ]
 # This test doesn't need to be run with the stable release mode.
 crbug.com/490015 virtual/stable/http/tests/navigation/beacon-blob-with-non-simple-type.html [ Skip ]
 # This test fails with the stable release mode.
 crbug.com/490015 virtual/stable/http/tests/navigation/same-and-different-back.html [ Skip ]