GitLab

Add a check to make sure the content directory handle list size doesn't
exceed the 16 bit handle-id space.

Test: web_engine_unittests
Bug: 1073176
Change-Id: I0a90f5bcca35a3c0e29e605bda9c6439092d3d29
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2283556
Commit-Queue: Sharon Yang <yangsharon@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: David Dorwin <ddorwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#786062}