This is the larger dictionary specialized for Name. To be used as a
property backing store.

More methods and tests will be added in the future as it reaches
parity with NameDictionary.


Bug: v8:6443, v8:7569
Change-Id: I8f5d88b2f6f4e14d4851548566ffa9f59535358b
Reviewed-on: https://chromium-review.googlesource.com/c/1329204Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57430}