Started at https://build.chromium.org/p/chromium.memory.fyi/builders/Windows%20Unit%20%28DrMemory%29/builds/5313 due to r405307

Probably some part of the test is not cleaning up correctly between test cases. Unlike other bots, DrMemory runs the tests serially:

[----------] 8 tests from BlacklistTest
[ RUN      ] BlacklistTest.Beacon
[       OK ] BlacklistTest.Beacon (141 ms)
[ RUN      ] BlacklistTest.AddAndRemoveModules
[       OK ] BlacklistTest.AddAndRemoveModules (0 ms)
[ RUN      ] BlacklistTest.SuccessfullyBlocked
[       OK ] BlacklistTest.SuccessfullyBlocked (0 ms)
[ RUN      ] BlacklistTest.LoadBlacklistedLibrary
c:\b\build\slave\drm-cr\build\src\chrome_elf\blacklist\test\blacklist_test.cc(301): error: Value of: TestDll_IsBlacklistInitialized()
  Actual: false
Expected: true
[  FAILED  ] BlacklistTest.LoadBlacklistedLibrary (47 ms)
[ RUN      ] BlacklistTest.AddDllsFromRegistryToBlacklist
c:\b\build\slave\drm-cr\build\src\chrome_elf\blacklist\test\blacklist_test.cc(321): error: Value of: TestDll_IsBlacklistInitialized()
  Actual: false
Expected: true
[  FAILED  ] BlacklistTest.AddDllsFromRegistryToBlacklist (0 ms)
[ RUN      ] BlacklistTest.ResetBeacon
[       OK ] BlacklistTest.ResetBeacon (16 ms)
[ RUN      ] BlacklistTest.SetupFailed
[       OK ] BlacklistTest.SetupFailed (0 ms)
[ RUN      ] BlacklistTest.SetupSucceeded
[       OK ] BlacklistTest.SetupSucceeded (0 ms)
[----------] 8 tests from BlacklistTest (219 ms total)

vs https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%281%29/builds/54906/ :

Using 8 parallel jobs.
[1/50] ChromeElfUtilTest.BrowserProcessTest (0 ms)
[2/50] ChromeElfUtilTest.NTRegistry (0 ms)
...
[41/50] BlacklistTest.Beacon (47 ms)
[42/50] BlacklistTest.AddAndRemoveModules (0 ms)
[43/50] BlacklistTest.SuccessfullyBlocked (0 ms)
[44/50] BlacklistTest.LoadBlacklistedLibrary (63 ms)
[45/50] BlacklistTest.AddDllsFromRegistryToBlacklist (0 ms)
[46/50] BlacklistTest.ResetBeacon (0 ms)
[47/50] BlacklistTest.SetupFailed (0 ms)
[48/50] BlacklistTest.SetupSucceeded (0 ms)
[49/50] ChromeElfUtilTest.CanaryTest (0 ms)
[50/50] ChromeElfUtilTest.SystemInstallTest (0 ms)
SUCCESS: all tests passed.