The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b43def902a146c87730d3aaca643ecd8e8992f7e

commit b43def902a146c87730d3aaca643ecd8e8992f7e
Author: Xida Chen <xidachen@chromium.org>
Date: Thu Aug 16 15:46:19 2018

Mark virtual/threaded/fast/scroll-behavior/smooth-scroll/mousewheel-scroll.html flaky

TBR=wjmaclean@chromium.org
NOTRY=true

Bug: 874931
Change-Id: I49375c4593122e9a3a1f8c06ffa3969b6fa1ea1c
Reviewed-on: https://chromium-review.googlesource.com/1177904
Reviewed-by: Xida Chen <xidachen@chromium.org>
Commit-Queue: Xida Chen <xidachen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583668}
[modify] https://crrev.com/b43def902a146c87730d3aaca643ecd8e8992f7e/third_party/WebKit/LayoutTests/TestExpectations

This can also crash, https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Linux%20Tests%20%28dbg%29%281%29/76246:

15:16:26.811 26623 worker/3 virtual/threaded/fast/scroll-behavior/smooth-scroll/mousewheel-scroll.html crashed, (stderr lines):
15:16:26.811 26623   
15:16:26.811 26623   DevTools listening on ws://127.0.0.1:44265/devtools/browser/3008b28a-7c24-4448-bb40-cfc8a90f3ba3
15:16:26.811 26623   [1:1:1206/151626.039088:FATAL:layer.cc(867)] Check failed: layer_tree_host_ && layer_tree_host_->CommitRequested(). 
15:16:26.811 26623   #0 0x7f1e9c1a9c7d base::debug::StackTrace::StackTrace()
15:16:26.811 26623   #1 0x7f1e9be99e5a base::debug::StackTrace::StackTrace()
15:16:26.811 26623   #2 0x7f1e9bf0bc6b logging::LogMessage::~LogMessage()
15:16:26.811 26623   #3 0x7f1e9206553b cc::Layer::SetScrollOffsetFromImplSide()
15:16:26.811 26623   #4 0x7f1e922471ed cc::LayerTreeHost::ApplyViewportChanges()
15:16:26.811 26623   #5 0x7f1e92247d92 cc::LayerTreeHost::ApplyScrollAndScale()
15:16:26.811 26623   #6 0x7f1e9234bc2d cc::ProxyMain::BeginMainFrame()
15:16:26.811 26623   #7 0x7f1e92348883 _ZN4base8internal13FunctorTraitsIMN2cc9ProxyMainEFvNSt3__110unique_ptrINS2_28BeginMainFrameAndCommitStateENS4_14default_deleteIS6_EEEEEvE6InvokeISB_NS_7WeakPtrIS3_EEJS9_EEEvT_OT0_DpOT1_
15:16:26.811 26623   #8 0x7f1e92348695 _ZN4base8internal12InvokeHelperILb1EvE8MakeItSoIMN2cc9ProxyMainEFvNSt3__110unique_ptrINS4_28BeginMainFrameAndCommitStateENS6_14default_deleteIS8_EEEEENS_7WeakPtrIS5_EEJSB_EEEvOT_OT0_DpOT1_
15:16:26.811 26623   #9 0x7f1e9234854c _ZN4base8internal7InvokerINS0_9BindStateIMN2cc9ProxyMainEFvNSt3__110unique_ptrINS3_28BeginMainFrameAndCommitStateENS5_14default_deleteIS7_EEEEEJNS_7WeakPtrIS4_EENS0_13PassedWrapperISA_EEEEEFvvEE7RunImplISC_NS5_5tupleIJSE_SG_EEEJLm0ELm1EEEEvOT_OT0_NS5_16integer_sequenceImJXspT1_EEEE
15:16:26.811 26623   #10 0x7f1e92348429 _ZN4base8internal7InvokerINS0_9BindStateIMN2cc9ProxyMainEFvNSt3__110unique_ptrINS3_28BeginMainFrameAndCommitStateENS5_14default_deleteIS7_EEEEEJNS_7WeakPtrIS4_EENS0_13PassedWrapperISA_EEEEEFvvEE7RunOnceEPNS0_13BindStateBaseE
15:16:26.811 26623   #11 0x7f1e9be4942e _ZNO4base12OnceCallbackIFvvEE3RunEv
15:16:26.811 26623   #12 0x7f1e9be9b422 base::debug::TaskAnnotator::RunTask()
15:16:26.811 26623   #13 0x7f1e9c081233 base::sequence_manager::internal::ThreadControllerImpl::DoWork()
15:16:26.811 26623   #14 0x7f1e9c0840d1 _ZN4base8internal13FunctorTraitsIMNS_16sequence_manager8internal20ThreadControllerImplEFvNS4_8WorkTypeEEvE6InvokeIS7_RKNS_7WeakPtrIS4_EEJRKS5_EEEvT_OT0_DpOT1_
15:16:26.811 26623   #15 0x7f1e9c084035 _ZN4base8internal12InvokeHelperILb1EvE8MakeItSoIRKMNS_16sequence_manager8internal20ThreadControllerImplEFvNS6_8WorkTypeEERKNS_7WeakPtrIS6_EEJRKS7_EEEvOT_OT0_DpOT1_
15:16:26.811 26623   #16 0x7f1e9c083fad _ZN4base8internal7InvokerINS0_9BindStateIMNS_16sequence_manager8internal20ThreadControllerImplEFvNS5_8WorkTypeEEJNS_7WeakPtrIS5_EES6_EEEFvvEE7RunImplIRKS8_RKNSt3__15tupleIJSA_S6_EEEJLm0ELm1EEEEvOT_OT0_NSH_16integer_sequenceImJXspT1_EEEE
15:16:26.811 26623   #17 0x7f1e9c083eac _ZN4base8internal7InvokerINS0_9BindStateIMNS_16sequence_manager8internal20ThreadControllerImplEFvNS5_8WorkTypeEEJNS_7WeakPtrIS5_EES6_EEEFvvEE3RunEPNS0_13BindStateBaseE
15:16:26.811 26623   #18 0x7f1e9be4942e _ZNO4base12OnceCallbackIFvvEE3RunEv
15:16:26.811 26623   #19 0x7f1e9be9b422 base::debug::TaskAnnotator::RunTask()
15:16:26.811 26623   #20 0x7f1e9bf31bea base::MessageLoopImpl::RunTask()
15:16:26.811 26623   #21 0x7f1e9bf31f6e base::MessageLoopImpl::DeferOrRunPendingTask()
15:16:26.811 26623   #22 0x7f1e9bf328e9 base::MessageLoopImpl::DoWork()
15:16:26.812 26623   #23 0x7f1e9bf37457 base::MessagePumpDefault::Run()
15:16:26.812 26623   #24 0x7f1e9bf31313 base::MessageLoopImpl::Run()
15:16:26.812 26623   #25 0x7f1e9bfdc9dd base::RunLoop::Run()
15:16:26.812 26623   #26 0x7f1e98b6c0c5 content::RendererMain()
15:16:26.812 26623   #27 0x7f1e98db6a3e content::RunZygote()
15:16:26.812 26623   #28 0x7f1e98db8f49 content::RunOtherNamedProcessTypeMain()
15:16:26.812 26623   #29 0x7f1e98dbad69 content::ContentMainRunnerImpl::Run()
15:16:26.812 26623   #30 0x7f1e98db18ac content::ContentServiceManagerMainDelegate::RunEmbedderProcess()
15:16:26.812 26623   #31 0x7f1e70e44c2a service_manager::Main()
15:16:26.812 26623   #32 0x7f1e98db62a3 content::ContentMain()
15:16:26.812 26623   #33 0x55ff6572b185 main
15:16:26.812 26623   #34 0x7f1e72115f45 __libc_start_main
15:16:26.812 26623   #35 0x55ff6572b02a _start
15:16:26.812 26623   
15:16:26.812 26623   [5868:5963:1206/151626.185951:WARNING:crash_handler_host_linux.cc(342)] Could not translate tid, attempt = 1 retry ...
15:16:26.816 26542 [951/4043] virtual/threaded/fast/scroll-behavior/smooth-scroll/mousewheel-scroll.html failed unexpectedly (renderer crashed)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/63eeea392719b0286deaff68c3cf2970ae41fe40

commit 63eeea392719b0286deaff68c3cf2970ae41fe40
Author: Jeffrey Yasskin <jyasskin@chromium.org>
Date: Fri Dec 07 01:57:38 2018

Disable several flaky layout tests.

virtual/threaded/fast/scroll-behavior/smooth-scroll/main-thread-scrolling-reason-correctness.html can time out.
http/tests/devtools/sources/debugger-breakpoints/restore-locations-for-breakpoint-with-broken-source-map.js can fail.
virtual/android/fullscreen/full-screen-iframe-allowed-video.html can fail.
virtual/threaded/fast/scroll-behavior/smooth-scroll/mousewheel-scroll.html can crash.
rtual/threaded/fast/scroll-behavior/smooth-scroll/scroll-during-selection.html can crash.

Bug: 912793, 874931, 905694
Change-Id: I06dff11457e545edb7d40c5797096086c066e793
Tbr: rakina@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/1367096
Reviewed-by: Jeffrey Yasskin <jyasskin@chromium.org>
Commit-Queue: Jeffrey Yasskin <jyasskin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614573}
[modify] https://crrev.com/63eeea392719b0286deaff68c3cf2970ae41fe40/third_party/blink/web_tests/TestExpectations