The virtual/android/fullscreen tests crash with blink gen property trees. There's a comment in enable-blink-gen-property-trees that these are missing scrollbar property tree nodes.

These can be run with:
  third_party/blink/tools/run_web_tests.py --debug --additional-driver-flag=--enable-blink-gen-property-trees virtual/android/fullscreen --skipped=ignore

These are listed in enable-blink-gen-property-trees (https://cs.chromium.org/chromium/src/third_party/WebKit/LayoutTests/FlagExpectations/enable-blink-gen-property-trees?g=0&l=197), here are the first of 91 entries:
  crbug.com/836890 virtual/android/fullscreen/anonymous-block-merge-crash.html [ Crash ]
  crbug.com/836890 virtual/android/fullscreen/api/document-exit-fullscreen-vs-request.html [ Crash ]
  crbug.com/836890 virtual/android/fullscreen/api/element-request-fullscreen-two-elements.html [ Crash ]
  crbug.com/836890 virtual/android/fullscreen/api/element-request-fullscreen-two-iframes.html [ Crash ]
  crbug.com/836890 virtual/android/fullscreen/api/element-request-fullscreen-vs-exit.html [ Crash ]
  crbug.com/836890 virtual/android/fullscreen/enter-exit-full-screen-hover.html [ Crash ]
  crbug.com/836890 virtual/android/fullscreen/exit-full-screen-iframe.html [ Crash ]
  crbug.com/836890 virtual/android/fullscreen/full-screen-ancestor-shadow.html [ Crash ]
  crbug.com/836890 virtual/android/fullscreen/full-screen-api.html [ Crash ]
  crbug.com/836890 virtual/android/fullscreen/full-screen-cancel-nested.html [ Crash ]

When I run these tests, they fail with:
-----------------------8<-----------------------
STDERR: Received signal 11 SEGV_MAPERR 000000000030
STDERR: 0  base::debug::StackTrace::StackTrace(unsigned long) + 174
STDERR: 1  base::debug::StackTrace::StackTrace(unsigned long) + 29
STDERR: 2  base::debug::StackTrace::StackTrace() + 28
STDERR: 3  base::debug::(anonymous namespace)::StackDumpSignalHandler(int, __siginfo*, void*) + 1407
STDERR: 4  _sigtramp + 26
STDERR: 5  0x0 + 4501181784
STDERR: 6  gfx::SizeF::SizeF(gfx::Size const&) + 36
STDERR: 7  cc::LayerTreeImpl::UpdateScrollbarGeometries() + 1196
STDERR: 8  cc::ScrollbarLayerImplBase::CanScrollOrientation() const + 390
STDERR: 9  cc::ScrollbarAnimationController::ApplyOpacityToScrollbars(float) + 448
STDERR: 10 cc::ScrollbarAnimationController::Show() + 52
STDERR: 11 cc::ScrollbarAnimationController::UpdateScrollbarState() + 75
STDERR: 12 cc::ScrollbarAnimationController::DidScrollUpdate() + 21
STDERR: 13 cc::LayerTreeImpl::DidUpdatePageScale() + 255
STDERR: 14 cc::LayerTreeImpl::PushPageScaleFactorAndLimits(float const*, float, float) + 666
STDERR: 15 cc::LayerTreeImpl::PushPropertiesTo(cc::LayerTreeImpl*) + 2471
STDERR: 16 cc::LayerTreeHostImpl::ActivateSyncTree() + 1910
STDERR: 17 cc::ProxyImpl::ScheduledActionActivateSyncTree() + 510
STDERR: 18 cc::Scheduler::ProcessScheduledActions() + 1340
STDERR: 19 cc::Scheduler::NotifyReadyToActivate() + 101
STDERR: 20 cc::ProxyImpl::NotifyReadyToActivate() + 501
STDERR: 21 cc::LayerTreeHostImpl::NotifyReadyToActivate() + 199
STDERR: 22 cc::TileManager::IssueSignals() + 381
STDERR: 23 cc::TileManager::CheckPendingGpuWorkAndIssueSignals() + 3765
STDERR: 24 cc::TileManager::FlushAndIssueSignals() + 326
-----------------------8<-----------------------