Surprisingly initializing the input id and filename show up in the profiles, so make them lazy as most traversals don't use them.
Surprisingly initializing the input id and filename show up in the profiles, so make them lazy as most traversals don't use them.

PiperOrigin-RevId: 355288206

monetate/closure-compiler,ChadKillingsworth/closure-compiler,ChadKillingsworth/closure-compiler,ChadKillingsworth/closure-compiler,monetate/closure-compiler,nawawi/closure-compiler,nawawi/closure-compiler,nawawi/closure-compiler,nawawi/closure-compiler,google/closure-compiler,ChadKillingsworth/closure-compiler,google/closure-compiler,google/closure-compiler,monetate/closure-compiler,google/closure-compiler,monetate/closure-compiler