TaskSchedulerImpl::~TaskSchedulerImpl() {
#if DCHECK_IS_ON()
  DCHECK(join_for_testing_returned_.IsSet());
#endif
}

During investigation of  issue 693203  it was discovered that some tests hit this DCHECK in first try, and then succeed in second try.

For some reason third_party/android_platform/development/scripts/stack doesn't work, so I've tried to disassemble the failing stack manually.
Looks something like:

logging::LogMessage::~LogMessage()
base::internal::TaskSchedulerImpl::~TaskSchedulerImpl()
base::internal::TaskSchedulerImpl::~TaskSchedulerImpl()
base::TaskScheduler::SetInstance(std::__ndk1::unique_ptr<base::TaskScheduler, std::__ndk1::default_delete<base::TaskScheduler> >)
base::TaskScheduler::CreateAndSetDefaultTaskScheduler(std::__ndk1::vector<base::SchedulerWorkerPoolParams, std::__ndk1::allocator<base::SchedulerWorkerPoolParams> > const&, base::Callback<unsigned long (base::TaskTraits const&), (base::internal::CopyMode)1, (base::internal::RepeatMode)1> const&)
base::TaskScheduler::CreateAndSetSimpleTaskScheduler(int)
gl::GLImageTest<gl::(anonymous namespace)::GLImageSharedMemoryTestDelegate<(gfx::BufferFormat)7> >::SetUp()
void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*)
testing::Test::Run()
testing::TestInfo::Run()
testing::TestCase::Run()
testing::internal::UnitTestImpl::RunAllTests()
testing::UnitTest::Run()
base::TestSuite::Run()
base::internal::Invoker<base::internal::BindState<void (disk_cache::BackendImpl::*)(), base::internal::UnretainedWrapper<disk_cache::BackendImpl> >, void ()>::Run(base::internal::BindStateBase*)
base::internal::RunMixin<base::Callback<int (), (base::internal::CopyMode)1, (base::internal::RepeatMode)1> >::Run() const
base::LaunchUnitTests(int, char**, base::Callback<int (), (base::internal::CopyMode)1, (base::internal::RepeatMode)1> const&)
main
Java_org_chromium_native_1test_NativeTest_nativeRunTests

fdoray@, looks like you've are the last to make changes in this area in https://codereview.chromium.org/2628313004, could you please take a look?