The test fails with a NSException. This is because OCMEqualTypesAllowingOpaqueStructs() returns false for the following two types:

^{ChromeBrowserState=^^?{map<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> >, std::__1::less<const void *>, std::__1::allocator<std::__1::pair<const void *const, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > > > >={__tree<std::__1::__value_type<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > >, std::__1::__map_value_compare<const void *, std::__1::__value_type<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > >, std::__1::less<const void *>, true>, std::__1::allocator<std::__1::__value_type<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > > > >=^{}{__compressed_pair<std::__1::__tree_end_node<std::__1::__tree_node_base<void *> *>, std::__1::allocator<std::__1::__tree_node<std::__1::__value_type<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > >, void *> > >={__tree_end_node<std::__1::__tree_node_base<void *> *>=^{}}}{__compressed_pair<unsigned long, std::__1::__map_value_compare<const void *, std::__1::__value_type<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > >, std::__1::less<const void *>, true> >=Q}}}{SequenceChecker={Lock={PlatformThreadRef=^{}}{LockImpl={_opaque_pthread_mutex_t=q[56c]}}}{unique_ptr<base::SequenceCheckerImpl::Core, std::__1::default_delete<base::SequenceCheckerImpl::Core> >={__compressed_pair<base::SequenceCheckerImpl::Core *, std::__1::default_delete<base::SequenceCheckerImpl::Core> >=^{}}}}^{}{scoped_refptr<net::URLRequestContextGetter>=^{}}}

^{ChromeBrowserState=^^?{map<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> >, std::__1::less<const void *>, std::__1::allocator<std::__1::pair<const void *const, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > > > >={__tree<std::__1::__value_type<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > >, std::__1::__map_value_compare<const void *, std::__1::__value_type<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > >, std::__1::less<const void *>, true>, std::__1::allocator<std::__1::__value_type<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > > > >=^{__tree_end_node<std::__1::__tree_node_base<void *> *>}{__compressed_pair<std::__1::__tree_end_node<std::__1::__tree_node_base<void *> *>, std::__1::allocator<std::__1::__tree_node<std::__1::__value_type<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > >, void *> > >={__tree_end_node<std::__1::__tree_node_base<void *> *>=^{__tree_node_base<void *>}}}{__compressed_pair<unsigned long, std::__1::__map_value_compare<const void *, std::__1::__value_type<const void *, std::__1::unique_ptr<base::SupportsUserData::Data, std::__1::default_delete<base::SupportsUserData::Data> > >, std::__1::less<const void *>, true> >=Q}}}{SequenceChecker={Lock={PlatformThreadRef=^{_opaque_pthread_t}}{LockImpl={_opaque_pthread_mutex_t=q[56c]}}}{unique_ptr<base::SequenceCheckerImpl::Core, std::__1::default_delete<base::SequenceCheckerImpl::Core> >={__compressed_pair<base::SequenceCheckerImpl::Core *, std::__1::default_delete<base::SequenceCheckerImpl::Core> >=^{Core}}}}^{URLDataManagerIOSBackend}{scoped_refptr<net::URLRequestContextGetter>=^{URLRequestContextGetter}}}

Note that the differences are due to some unnamed types in substructures (compare for example "scoped_refptr<net::URLRequestContextGetter>=^{}" and "scoped_refptr<net::URLRequestContextGetter>=^{URLRequestContextGetter}").