From https://ci.chromium.org/buildbot/chromium.clang/ToTLinuxUBSanVptr/1662

 RUN      ] LayerTreeHostImplTest.DamageShouldNotCareAboutContributingLayers
../../cc/trees/layer_tree_host_impl_unittest.cc:4531:7: runtime error: downcast of address 0x1d1c9cf82780 which does not point to an object of type 'cc::(anonymous namespace)::DidDrawCheckLayer'
0x1d1c9cf82780: note: object is of type 'cc::SolidColorLayerImpl'
 00 00 00 00  48 f1 e9 04 00 00 00 00  02 00 00 00 ff ff ff ff  00 fa e1 9c 1c 1d 00 00  c0 c1 de 9c
              ^~~~~~~~~~~~~~~~~~~~~~~
              vptr for 'cc::SolidColorLayerImpl'
    #0 0x1934370  (/b/s/w/ir/out/Release/cc_unittests+0x1934370)
    #1 0x23d0595  (/b/s/w/ir/out/Release/cc_unittests+0x23d0595)
    #2 0x23d252b  (/b/s/w/ir/out/Release/cc_unittests+0x23d252b)
    #3 0x23d3e92  (/b/s/w/ir/out/Release/cc_unittests+0x23d3e92)
    #4 0x23e5087  (/b/s/w/ir/out/Release/cc_unittests+0x23e5087)
    #5 0x23e4073  (/b/s/w/ir/out/Release/cc_unittests+0x23e4073)
    #6 0x2855159  (/b/s/w/ir/out/Release/cc_unittests+0x2855159)
    #7 0x285b4f3  (/b/s/w/ir/out/Release/cc_unittests+0x285b4f3)
    #8 0x285b339  (/b/s/w/ir/out/Release/cc_unittests+0x285b339)
    #9 0x21e92ef  (/b/s/w/ir/out/Release/cc_unittests+0x21e92ef)
    #10 0x7f9c8f2b2f44  (/lib/x86_64-linux-gnu/libc.so.6+0x21f44)
    #11 0x806029  (/b/s/w/ir/out/Release/cc_unittests+0x806029)