https://ci.chromium.org/buildbot/chromium.fyi/Mac%20Builder%20(dbg)%20Goma%20Canary/6438
https://ci.chromium.org/buildbot/chromium.fyi/Mac%20Builder%20(dbg)%20Goma%20Canary%20(clobber)/5452
https://ci.chromium.org/buildbot/chromium.goma/Chromium%20Linux%20Goma%20RBE%20Staging%20(dbg)%20(clobber)/241
https://ci.chromium.org/buildbot/chromium.goma/Chromium%20Linux%20Goma%20RBE%20Staging%20(dbg)/365

crash in content_unittest

e.g.
https://logs.chromium.org/v/?s=chromium%2Fbb%2Fchromium.fyi%2FMac_Builder__dbg__Goma_Canary%2F6438%2F%2B%2Frecipes%2Fsteps%2Fcontent_unittests%2F0%2Flogs%2FUserMediaClientImplTest.CreateWithAllOptionalInvalidDeviceId%2F0
 RUN      ] UserMediaClientImplTest.CreateWithAllOptionalInvalidDeviceId
Received signal 11 <unknown> 000000000000
0   libbase.dylib                       0x00000001208ce36e base::debug::StackTrace::StackTrace(unsigned long) + 174
1   libbase.dylib                       0x00000001208ce42d base::debug::StackTrace::StackTrace(unsigned long) + 29
2   libbase.dylib                       0x00000001204cb61c base::debug::StackTrace::StackTrace() + 28
3   libbase.dylib                       0x00000001208ce15f base::debug::(anonymous namespace)::StackDumpSignalHandler(int, __siginfo*, void*) + 1407
4   libsystem_platform.dylib            0x00007fff99979b3a _sigtramp + 26
5   libblink_platform.dylib             0x000000013fa11e40 blink::NormalPage::Contains(unsigned char*) + 160
6   libblink_platform.dylib             0x000000013f271d66 WTF::StringImpl::Release() const + 54
7   libblink_platform.dylib             0x000000013f271d25 scoped_refptr<WTF::StringImpl>::Release(WTF::StringImpl*) + 21


suspect https://chromium-review.googlesource.com/c/chromium/src/+/1061525