tree a839f066a42abf366cfa2f6c425443fd9b52c192
parent dfd1763d3ece19bcbf6291fd1493c3cd07c65d46
author Googler <jhorvitz@google.com> 1713302603 -0700
committer Copybara-Service <copybara-worker@google.com> 1713302711 -0700

Collapse inheritance hierarchy of `PersistentStringIndexer`.

`AbstractIndexer` and `CanonicalStringIndexer` only have a single subclass. Merge them both into `PersistentStringIndexer`.

PiperOrigin-RevId: 625452496
Change-Id: I12eaab56ffb36b5e5f3cb1c822ee737249d16eb8