[BlinkGenPropertyTrees] Group 836897 failures

Add new bug numbers for types of failures seen in animations failures
when enabling blink-gen-property-trees.

TBR=flackr@chromium.org
BUG=836897

Change-Id: I3375acfaac7470834de65e905714e5244b1715c3
Reviewed-on: https://chromium-review.googlesource.com/1113904Reviewed-by: Robert Flack <flackr@chromium.org>
Reviewed-by: Peter Mayo <petermayo@chromium.org>
Commit-Queue: Peter Mayo <petermayo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570149}

third_party/WebKit/LayoutTests/FlagExpectations/enable-blink-gen-property-trees

@@ -148,17 +148,19 @@ Bug(none) transitions/ [ Pass ]
 Bug(none) virtual/threaded/animations/ [ Pass ]
 Bug(none) virtual/threaded/transitions/ [ Pass ]
 Bug(none) virtual/threaded/fast/animationworklet/ [ Pass ]
-crbug.com/836897 transitions/opacity-transform-transitions-inside-iframe.html [ Timeout ]
-crbug.com/836897 transitions/transition-end-event-destroy-iframe.html [ Timeout ]
-crbug.com/836897 virtual/threaded/animations/composited-filter-webkit-filter.html [ Failure ]
-crbug.com/836897 virtual/threaded/animations/img-element-transform.html [ Timeout Failure Pass ]
-crbug.com/836897 virtual/threaded/animations/compositor-independent-transform-cancel.html [ Failure ]
-crbug.com/836897 virtual/threaded/fast/animationworklet/animation-worklet-animator-animate.html [ Failure ]
-crbug.com/836897 virtual/threaded/transitions/opacity-transform-transitions-inside-iframe.html [ Timeout ]
-crbug.com/836897 virtual/threaded/transitions/transition-end-event-destroy-iframe.html [ Timeout ]
-crbug.com/836897 virtual/threaded/fast/animationworklet/animation-worklet-animator-with-options.html [ Failure ]
-crbug.com/836897 virtual/threaded/fast/animationworklet/worklet-animation-currentTime.html [ Failure ]
-crbug.com/836897 virtual/threaded/fast/animationworklet/animation-worklet-scroll-timeline-overflow-hidden.html [ Crash ]
+
+#  crbug.com/836897 - covers 855688,855691,855702,855718
+crbug.com/855688 transitions/opacity-transform-transitions-inside-iframe.html [ Timeout ]
+crbug.com/855688 transitions/transition-end-event-destroy-iframe.html [ Timeout ]
+crbug.com/855688 virtual/threaded/transitions/opacity-transform-transitions-inside-iframe.html [ Timeout ]
+crbug.com/855688 virtual/threaded/transitions/transition-end-event-destroy-iframe.html [ Timeout ]
+crbug.com/855691 virtual/threaded/fast/animationworklet/animation-worklet-animator-animate.html [ Failure ]
+crbug.com/855691 virtual/threaded/fast/animationworklet/animation-worklet-animator-with-options.html [ Failure ]
+crbug.com/855691 virtual/threaded/fast/animationworklet/worklet-animation-currentTime.html [ Failure ]
+crbug.com/855702 virtual/threaded/animations/composited-filter-webkit-filter.html [ Failure ]
+crbug.com/855702 virtual/threaded/animations/img-element-transform.html [ Timeout Failure Pass ]
+crbug.com/855702 virtual/threaded/animations/compositor-independent-transform-cancel.html [ Failure ]
+crbug.com/855718 virtual/threaded/fast/animationworklet/animation-worklet-scroll-timeline-overflow-hidden.html [ Crash ]
 
 # These scrollbar tests should pass.
 Bug(none) virtual/prefer_compositing_to_lcd_text/scrollbars/ [ Pass ]