We forgot to apply the change to headers in the previous patch,
due to missing "-header-filter" in the run-clang-tidy invocation.
Differential Revision: https://reviews.llvm.org/D142307
Flags uses of const-qualified and reference data members in structs.
Implements rule C.12 of C++ Core Guidelines.
Differential Revision: https://reviews.llvm.org/D126880