run-webkit-tests --lint-test-files should lint all the ports by default

run-webkit-tests --lint-test-files should lint all the ports by default
https://bugs.webkit.org/show_bug.cgi?id=76749

Reviewed by Ojan Vafai.

Currently run-webkit-tests --lint-test-files will only lint the
test_expectations for the single port determined by the command
line options. This is not obvious and can produce unintended results
if you want to lint the chromium port (probably the normal case
for using --lint-test-files) but don't specify a port name or
--chromium.

I think we should probably lint *all* of the ports if no port
name is supplied. This change implements that, and also moves
the linting logic out of the Manager class, since this really
has nothing to do with Managers. It has little to do with
run-webkit-tests, but splitting it into a different script would
introduce compatibility issues. It might make sense to do that
anyway, in a separate patch and combining that with cleaning up
the style checker to share more code.

* Scripts/webkitpy/layout_tests/controllers/manager.py:
(Manager._strip_test_dir_prefix):
* Scripts/webkitpy/layout_tests/run_webkit_tests.py:
(lint):
(run):
* Scripts/webkitpy/layout_tests/run_webkit_tests_integrationtest.py:
(LintTest.test_all_configurations): added.
(LintTest.test_lint_test_files): added.
(LintTest.test_lint_test_files__errors): added.
(MainTest.test_lint_test_files): removed.
(MainTest.test_lint_test_files__errors): removed.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105936 268f45cc-cd09-0410-ab3c-d52691b4dbfc