GitLab

Remove the old and disabled test.

Previously we used to run the test partly in cpp and partly in JS.
This CL changes the test code to run entirely in JS, requiring less
context switches (== faster) and improving readability.

BUG=248500, 160361
Test=None, no visible changes.

Review URL: https://codereview.chromium.org/1144473003

Cr-Commit-Position: refs/heads/master@{#329863}