toolchain-utils: fix class-missing-docstring lint warnings.

BUG=chromium:570458
TEST='crosperf/run_tests.sh' passes.

Change-Id: I0640cab2c8d15380badbfbc0db39e3063cc85471
Reviewed-on: https://chrome-internal-review.googlesource.com/244867
Commit-Ready: Rahul Chaudhry <rahulchaudhry@google.com>
Tested-by: Rahul Chaudhry <rahulchaudhry@google.com>
Reviewed-by: Luis Lozano <llozano@chromium.org>

4 files changed, 7 insertions, 0 deletions

diff --git a/crosperf/crosperf.py b/crosperf/crosperf.py
index cc2c9010..9f8edc0e 100755
--- a/crosperf/crosperf.py
+++ b/crosperf/crosperf.py
@@ -22,6 +22,7 @@ import test_flag
 
 
 class MyIndentedHelpFormatter(optparse.IndentedHelpFormatter):
+  """Help formatter."""
 
   def format_description(self, description):
     return description
diff --git a/crosperf/experiment_runner_unittest.py b/crosperf/experiment_runner_unittest.py
index 2fc512d9..3502ce60 100755
--- a/crosperf/experiment_runner_unittest.py
+++ b/crosperf/experiment_runner_unittest.py
@@ -48,6 +48,7 @@ EXPERIMENT_FILE_1 = """
 
 
 class FakeLogger(object):
+  """Fake logger for tests."""
 
   def __init__(self):
     self.LogOutputCount = 0
@@ -90,6 +91,7 @@ class FakeLogger(object):
 
 
 class ExperimentRunnerTest(unittest.TestCase):
+  """Test for experiment runner class."""
 
   run_counter = 0
   mock_logger = FakeLogger()
diff --git a/crosperf/machine_manager_unittest.py b/crosperf/machine_manager_unittest.py
index 8032e53b..0103ecdc 100755
--- a/crosperf/machine_manager_unittest.py
+++ b/crosperf/machine_manager_unittest.py
@@ -25,6 +25,7 @@ from cros_utils import logger
 
 
 class MyMachineManager(machine_manager.MachineManager):
+  """Machine manager for test."""
 
   def __init__(self, chromeos_root):
     super(MyMachineManager, self).__init__(chromeos_root, 0, 'average',
@@ -57,6 +58,7 @@ LABEL_MIX = label.MockLabel('mix', 'chromeos_image', CHROMEOS_ROOT, 'mix',
 
 
 class MachineManagerTest(unittest.TestCase):
+  """Test for machine manager class."""
 
   mock_cmd_exec = mock.Mock(spec=command_executer.CommandExecuter)
 
@@ -653,6 +655,7 @@ wlan0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
 
 
 class CrosMachineTest(unittest.TestCase):
+  """Test for CrosMachine class."""
 
   mock_cmd_exec = mock.Mock(spec=command_executer.CommandExecuter)
 
diff --git a/crosperf/suite_runner.py b/crosperf/suite_runner.py
index b75427f2..622e3395 100644
--- a/crosperf/suite_runner.py
+++ b/crosperf/suite_runner.py
@@ -271,6 +271,7 @@ class SuiteRunner(object):
 
 
 class MockSuiteRunner(object):
+  """Mock suite runner for test."""
 
   def __init__(self):
     self._true = True