Add 3 new command-line options to autotest desktopui_PyAutoPerfTests.

The new command-line options are:

1) --list-tests: To list the names of all pyauto perf tests that comprise
   desktopui_PyAutoPerfTests.
2) --perf-key-info=X, where X is a comma-separated list of perf keys: To list
   the names of all pyauto tests associated with the specified perf keys.
3) --run-perf-keys=X, where X is a comma-separated lsit of perf keys: To run
   only those tests required to compute values for the specified perf keys.

BUG=chromium-os:24738
TEST=Verified the autotest runs properly using the new command-line options,
     on a local chromeOS device.

Change-Id: I2b0ec10eacb717267e4c2f3c4798cc614f7d2e8f
Reviewed-on: https://gerrit.chromium.org/gerrit/35352
Reviewed-by: asharif <asharif@chromium.org>
Commit-Ready: Dennis Jeffrey <dennisjeffrey@chromium.org>
Tested-by: Dennis Jeffrey <dennisjeffrey@chromium.org>
1 file changed