Update from https://crrev.com/327068

testing/legion/task_controller.py

Index: testing/legion/task_controller.py
diff --git a/testing/legion/task_controller.py b/testing/legion/task_controller.py
index df9ddbdeb56370b26b6e08e974fc59050a17edea..9514f44fddd89a0ad6dae6b67ccc4b086417d37a 100644
--- a/testing/legion/task_controller.py
+++ b/testing/legion/task_controller.py
@@ -17,6 +17,7 @@ import xmlrpclib
 
 #pylint: disable=relative-import
 import common_lib
+import process
 
 ISOLATE_PY = os.path.join(common_lib.SWARMING_DIR, 'isolate.py')
 SWARMING_PY = os.path.join(common_lib.SWARMING_DIR, 'swarming.py')
@@ -125,6 +126,10 @@ class TaskController(object):
     for task in cls._tasks:
       task.Release()
 
+  def Process(self, cmd, verbose=False, detached=False, cwd=None):
+    return process.ControllerProcessWrapper(
+        self.rpc, cmd, verbose, detached, cwd)
+
   def _CreateOTP(self):
     """Creates the OTP."""
     controller_name = socket.gethostname()