This templatized class is only ever used for base::string16. Since that
is the only string type it will be used with in the foreseeable future,
remove the overhead of the template.
Change-Id: I7a62e83ab612c1d7e7b2461a50bc7be7be0768f9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2207737
Reviewed-by: Daniel Hosseinian <dhoss@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#770809}
cbc5e46d2c