The source code of those functions is simple a ternary operator, and
the test seems to have been designed as a "regression" test for the
previous implementation (which used a macro, and thus evaluated its
arguments multiple times).

I don't think the test is worth the weight of supporting importing
JS natives from tests.

This patch removes the last test that depends on JS natives.

R=littledan@chromium.org

Review-Url: https://codereview.chromium.org/2711833002
Cr-Commit-Position: refs/heads/master@{#43394}