The {setTableLength} method is redundant and has a single user. Remove
it, use {setTableBounds} instead.

Drive-by: Add default to the table max, to document that this can
actually be {undefined}, in which case the table has no maximum.

R=binji@chromium.org

Bug: v8:8238
Change-Id: I0d7a2f4d49d083f7adadbb4b6cd4933bcb1dc174
Reviewed-on: https://chromium-review.googlesource.com/c/1350126Reviewed-by: Ben Smith <binji@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57860}