When oversubscribing my laptop with "$ out\Debug\base_unittests.exe --test-launcher-jobs=42 --gtest_filter=* " I reliably hit this flake.

[ RUN      ] StackSamplingProfilerTest.StopDuringInterBurstInterval
../../base/profiler/stack_sampling_profiler_unittest.cc(931): error: Expected equality of these values:
  1u
    Which is: 1
  profiles.size()
    Which is: 0
Stack trace:
Backtrace:
        StackTraceGetter::CurrentStackTrace [0x00007FF617D5BF30+80] (D:\src\chrome\src\third_party\googletest\custom\gtest\internal\custom\stack_trace_getter.cc:24)
        testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop [0x00007FF617D74BDA+90] (D:\src\chrome\src\third_party\googletest\src\googletest\src\gtest.cc:810)
        testing::internal::AssertHelper::operator= [0x00007FF617D746DA+90] (D:\src\chrome\src\third_party\googletest\src\googletest\src\gtest.cc:382)
        base::StackSamplingProfilerTest_StopDuringInterBurstInterval_Test::TestBody [0x00007FF61743FDE4+452] (D:\src\chrome\src\base\profiler\stack_sampling_profiler_unittest.cc:931)