[Android] Add a custom pylintrc for build/android/.

build/android/devil/android/decorators.py

Index: build/android/devil/android/decorators.py
diff --git a/build/android/devil/android/decorators.py b/build/android/devil/android/decorators.py
index 39bd165c2a0db175fb2a034c52eb68a23dbf34e3..6dd72b0b0f59f2ba47429bcf6bb7d79c494d74de 100644
--- a/build/android/devil/android/decorators.py
+++ b/build/android/devil/android/decorators.py
@@ -7,7 +7,6 @@ Function/method decorators that provide timeout and retry logic.
 """
 
 import functools
-import os
 import sys
 import threading
 
@@ -15,7 +14,6 @@ from devil.android import device_errors
 from devil.utils import cmd_helper
 from devil.utils import reraiser_thread
 from devil.utils import timeout_retry
-from pylib import constants
 
 DEFAULT_TIMEOUT_ATTR = '_default_timeout'
 DEFAULT_RETRIES_ATTR = '_default_retries'
@@ -136,6 +134,7 @@ def WithTimeoutAndRetriesFromInstance(
     The actual decorator.
   """
   def decorator(f):
+    # pylint: disable=unused-argument

[perezju, 2015/09/04 09:01:53]

We are needing to do this quite often, and there seems to be a way to specify
"dummy" variables in pylint [1]. Could we enable something like that instead?

[1]: http://docs.pylint.org/features.html#id6

[jbudorick, 2015/09/04 16:51:56]

done

     def get_timeout(inst, *_args, **kwargs):
       return kwargs.get('timeout', getattr(inst, default_timeout_name))
     def get_retries(inst, *_args, **kwargs):