The security owners presubmit checks expect files to be named with certain conventions. If they aren't, the security owner presubmit checks won't notice them.

List of EnumTraits defined in files that won't be covered by presubmit checks:
https://cs.chromium.org/search/?q=EnumTraits+-f:struct_traits+-f:mojom_traits+-f:gen+f:%5C.h$&sq=package:chromium&type=cs

List of StructTraits defined in files that won't be covered:
https://cs.chromium.org/search/?q=StructTraits+-f:struct_traits+-f:mojom_traits+-f:gen+f:%5C.h$&sq=package:chromium&type=cs

So on and so forth.