OS: OSX
Version: ToT @ 06861239bfdf6351fa5279a69080f5f14b07cfb1

Just hit this DCHECK while trying to use chrome with dcheck_always_on

[77999:775:0621/111926.103629:FATAL:top_sites_impl.cc(776)] Check failed: success.
0   libbase.dylib                       0x0000000103d3873c base::debug::StackTrace::StackTrace(unsigned long) + 28
1   libbase.dylib                       0x0000000103d62852 logging::LogMessage::~LogMessage() + 210
2   libchrome_dll.dylib                 0x00000001059fa71a history::TopSitesImpl::SetTopSites(std::__1::vector<history::MostVisitedURL, std::__1::allocator<history::MostVisitedURL> > const&, history::TopSitesImpl::CallLocation) + 954
3   libchrome_dll.dylib                 0x00000001059fb15b history::TopSitesImpl::OnTopSitesAvailableFromHistory(std::__1::vector<history::MostVisitedURL, std::__1::allocator<history::MostVisitedURL> > const*) + 107
4   libchrome_dll.dylib                 0x00000001059eaf35 base::internal::Invoker<base::internal::BindState<base::Callback<void (std::__1::vector<history::MostVisitedURL, std::__1::allocator<history::MostVisitedURL> > const*), (base::internal::CopyMode)1, (base::internal::RepeatMode)1>, base::internal::OwnedWrapper<std::__1::vector<history::MostVisitedURL, std::__1::allocator<history::MostVisitedURL> > > >, void ()>::Run(base::internal::BindStateBase*) + 117
5   libbase.dylib                       0x0000000103ddaa5d base::(anonymous namespace)::RunIfNotCanceledThenUntrack(base::CancellationFlag const*, base::Callback<void (), (base::internal::CopyMode)0, (base::internal::RepeatMode)0>, base::Callback<void (), (base::internal::CopyMode)0, (base::internal::RepeatMode)0>) + 61
6   libbase.dylib                       0x0000000103ddb806 base::internal::Invoker<base::internal::BindState<void (*)(base::CancellationFlag const*, base::Callback<void (), (base::internal::CopyMode)0, (base::internal::RepeatMode)0>, base::Callback<void (), (base::internal::CopyMode)0, (base::internal::RepeatMode)0>), base::internal::OwnedWrapper<base::CancellationFlag>, base::Callback<void (), (base::internal::CopyMode)0, (base::internal::RepeatMode)0>, base::Callback<void (), (base::internal::CopyMode)0, (base::internal::RepeatMode)0> >, void ()>::RunOnce(base::internal::BindStateBase*) + 70
7   libbase.dylib                       0x0000000103df4571 base::(anonymous namespace)::PostTaskAndReplyRelay::RunReplyAndSelfDestruct() + 193
8   libbase.dylib                       0x0000000103d390a6 base::debug::TaskAnnotator::RunTask(char const*, base::PendingTask*) + 310
9   libbase.dylib                       0x0000000103d7cde9 base::MessageLoop::RunTask(base::PendingTask*) + 441
10  libbase.dylib                       0x0000000103d7d255 base::MessageLoop::DeferOrRunPendingTask(base::PendingTask) + 213
11  libbase.dylib                       0x0000000103d7d5b9 base::MessageLoop::DoWork() + 425
12  libbase.dylib                       0x0000000103d8165a base::MessagePumpCFRunLoopBase::RunWork() + 42
13  libbase.dylib                       0x0000000103d64a1a base::mac::CallWithEHFrame(void () block_pointer) + 10
14  libbase.dylib                       0x0000000103d80f7f base::MessagePumpCFRunLoopBase::RunWorkSource(void*) + 63


Marc, you seem the last one who touched that DCHECK in https://chromium-review.googlesource.com/531085.