Add mojo python bindings tests to the waterfalls.

scripts/slave/recipe_modules/chromium/steps.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 
 class Test(object):
   """
   Base class for tests that can be retried after deapplying a previously
   applied patch.
   """
@@ skipping 507 matching lines @@
   name = 'mojo_python_tests'
 
   def run_step(self, api, suffix, cmd_args, **kwargs):
     return api.python(self._step_name(suffix),
                       api.path['checkout'].join('mojo', 'tools',
                                                 'run_mojo_python_tests.py'),
                       cmd_args,
                       **kwargs)
 
 
+class MojoPythonBindingsTests(PythonBasedTest):  # pylint: disable=W0232
+  name = 'mojo_python_bindings_tests'
+
+  def run_step(self, api, suffix, cmd_args, **kwargs):
+    component = api.chromium.c.gyp_env.GYP_DEFINES.get('component', None)
+    # Python modules are not build for the component build.
+    if component == 'shared_library':
+      return None
+    args = cmd_args
+    args.extend(['--build-dir', api.chromium.c.build_dir])
+    return api.python(
+        self._step_name(suffix),
+        api.path['checkout'].join('mojo', 'tools',
+                                  'run_mojo_python_bindings_tests.py'),
+        args,
+        **kwargs)
+
+
 class PrintPreviewTests(PythonBasedTest):  # pylint: disable=W032
   name = 'print_preview_tests'
 
   def run_step(self, api, suffix, cmd_args, **kwargs):
     platform_arg = '.'.join(['browser_test',
         api.platform.normalize_platform_name(api.platform.name)])
-    args = list(cmd_args)
+    args = cmd_args
     path = api.path['checkout'].join(
         'webkit', 'tools', 'layout_tests', 'run_webkit_tests.py')
     args.extend(['--platform', platform_arg])
 
     # This is similar to how api.chromium.run_telemetry_test() sets the
     # environment variable for the sandbox.
     env = {}
     if api.platform.is_linux:
       env['CHROME_DEVEL_SANDBOX'] = api.path.join(
           '/opt', 'chromium', 'chrome_sandbox')
@@ skipping 220 matching lines @@
   GTestTest('crypto_unittests'),
   GTestTest('gfx_unittests'),
   GTestTest('url_unittests'),
   GTestTest('content_unittests'),
   GTestTest('net_unittests'),
   GTestTest('ui_unittests'),
   GTestTest('ui_ios_unittests'),
   GTestTest('sync_unit_tests'),
   GTestTest('sql_unittests'),
 ]