Extract `mojo_test` - standalone apptest runner in devtools.

Extract `mojo_test` - standalone apptest runner in devtools.

This patch adds a standalone script for running apptests in devtools,
and makes the Mojo repo mojo/tools/apptest_runner.py script a wrapper
that builds a command line for `mojo_test` and defers to it.

This allows Mojo consumers to directly rely on mojo_run + mojo_test,
without embedding devtoolslib themselves.

Fixes domokit/devtools#29.

R=qsr@chromium.org

Committed: https://chromium.googlesource.com/external/mojo/+/62b7a16b836f1a08e7ac53aedfdf43016325d364

[ppi, 2015-07-27 09:08:22]

ppi@chromium.org changed reviewers:
+ qsr@chromium.org

[ppi, 2015-07-27 09:08:31]

Hi Ben,

ptal.

[qsr, 2015-07-27 09:25:15]

https://codereview.chromium.org/1258903002/diff/1/mojo/tools/data/apptests
File mojo/tools/data/apptests (right):

https://codereview.chromium.org/1258903002/diff/1/mojo/tools/data/apptests#ne...
mojo/tools/data/apptests:4: # mopy.config.Config object, and must set a |tests|
global that will contain the
Documentation is outdated.

[ppi, 2015-07-27 10:03:04]

https://codereview.chromium.org/1258903002/diff/1/mojo/tools/data/apptests
File mojo/tools/data/apptests (right):

https://codereview.chromium.org/1258903002/diff/1/mojo/tools/data/apptests#ne...
mojo/tools/data/apptests:4: # mopy.config.Config object, and must set a |tests|
global that will contain the
On 2015/07/27 09:25:15, qsr wrote:
> Documentation is outdated.

Done.

[ppi, 2015-07-27 11:00:48]

Centralized the documentation as discussed offline, ptal.

[qsr, 2015-07-27 11:34:13]

lgtm

[ppi, 2015-07-27 11:43:18]

Committed patchset #3 (id:40001) manually as
62b7a16b836f1a08e7ac53aedfdf43016325d364 (presubmit successful).