This is the error:

In file included from ../../cc/base/resource_id.h:10:0,
                 from ../../cc/resources/returned_resource.h:10,
                 from ../../cc/resources/transferable_resource.cc:5:
../../base/containers/flat_set.h:157:43: error: ‘less’ in namespace ‘std’ does not name a template type
 template <class Key, class Compare = std::less<Key>>
                                           ^~~~
../../base/containers/flat_set.h:157:47: error: expected ‘>’ before ‘<’ token
 template <class Key, class Compare = std::less<Key>>
                                               ^
In file included from ../../cc/resources/returned_resource.h:10:0,
                 from ../../cc/resources/transferable_resource.cc:5:
../../cc/base/resource_id.h:15:48: error: template argument 2 is invalid