Chrome Version: 58.0.3010.0
OS: Windows 10

What steps will reproduce the problem?
(1) Run base_unittests in a DCHECK_IS_ON() build.

What is the expected result?

Expect that the tests reliably pass first time.

What happens instead?

Several of the tests usually fail the first time and only succeed when retried. The failure will look like:

[52160:41964:0211/004833.849:2119057156:FATAL:partition_alloc.cc(97)] Check failed: !root->initialized.

Tests which fail are:
[2380/2384] PartitionAllocTest.PreferActiveOverEmpty (0 ms)
[2381/2384] PartitionAllocTest.MultiAlloc (0 ms)
[2382/2384] PartitionAllocTest.GenericAllocGetSize (352 ms)
[2383/2384] PartitionAllocDeathTest.ImmediateDoubleFree (237 ms)
[2384/2384] PartitionAllocDeathTest.GuardPages (470 ms)