Introduces visitor methods for
- JSDataView
- JSTypedArray

Bug: chromium:885125, chromium:843903
Change-Id: I812eaf0619034641c6998f9d164bee84bc4c6ca2
Reviewed-on: https://chromium-review.googlesource.com/1235693Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56061}