Fix errors in preparation for stricter enforcement of @const in js_library. RELNOTES: N/A
Fix errors in preparation for stricter enforcement of @const in js_library.
RELNOTES: N/A

PiperOrigin-RevId: 384411365
Change-Id: I3a448930019c7b361b4ec04234ff68f3e09ca545

google/closure-library,google/closure-library,google/closure-library,google/closure-library,google/closure-library