Enable presubmit pylint in build/android.

build/android/pylib/utils/timeout_retry.py

 # Copyright 2013 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.
 
 """A utility to run functions with timeouts and retries."""
 
-import functools
 import threading
 
-import reraiser_thread
-import watchdog_timer
+from . import reraiser_thread
+from . import watchdog_timer
 
 
-def Run(func, timeout, retries, args=[], kwargs={}):
+def Run(func, timeout, retries, args=None, kwargs=None):
   """Runs the passed function in a separate thread with timeouts and retries.
 
   Args:
     func: the function to be wrapped.
     timeout: the timeout in seconds for each try.
     retries: the number of retries.
     args: list of positional args to pass to |func|.
     kwargs: dictionary of keyword args to pass to |func|.
 
   Returns:
     The return value of func(*args, **kwargs).
   """
+  if not args:
+    args = []
+  if not kwargs:
+    kwargs = {}
+
   # The return value uses a list because Python variables are references, not
   # values. Closures make a copy of the reference, so updating the closure's
   # reference wouldn't update where the original reference pointed.
   ret = [None]
   def RunOnTimeoutThread():
     ret[0] = func(*args, **kwargs)
 
   while True:
     try:
       name = 'TimeoutThread-for-%s' % threading.current_thread().name
       thread_group = reraiser_thread.ReraiserThreadGroup(
           [reraiser_thread.ReraiserThread(RunOnTimeoutThread, name=name)])
       thread_group.StartAll()
       thread_group.JoinAll(watchdog_timer.WatchdogTimer(timeout))
       return ret[0]
     except:
       if retries <= 0:
         raise
       retries -= 1