GitLab

Currently, when a bot runs a test (say, url_unittests) on a
is_chromeos_device build, it'll launch
`python test_env.py bin/run_url_unittests` (roughly speaking).

This CL flips that around so that the generated bin/run_ wrapper
script launches url_unittests via test_env.py (and the bot will
invoke bin/run_url_unittests directly).

This will make ChromeOS consistent with every platform other
than Android; Android will be converted to match as well in a
separate CL.

Note that apart from the test_env.py inversion, the location
of various other command line argument injections is unchanged,
so bin/run_url_unittests should run with the same args as before.

Bug: 816629
Change-Id: I5d0ac2ed847acb9685b27c41df1ed616311f64a6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2368537
Commit-Queue: Dirk Pranke <dpranke@google.com>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822012}