Original commit message:
> Remove redundant ParseInfo::scope_.
>
> This was always set to the literal's scope.
>
> (Additional change: mark getters as const.)
>
> R=adamk@chromium.org
> BUG=
>
> Review-Url: https://codereview.chromium.org/2216563003
> Cr-Commit-Position: refs/heads/master@{#38372}
> This was always set to the literal's scope.

TBR=adamk@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2216083003
Cr-Commit-Position: refs/heads/master@{#38393}