Inclusive language in PRESUBMIT.py.

TBR=tommi@webrtc.org

Bug: webrtc:11680
Change-Id: I8db5e3fdd087f9b4bb5b3e1baffbab6456f7ced8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/179960
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31779}

presubmit_test_mocks.py

@@ -33,7 +33,8 @@ class MockInputApi(object):
     return self.files
 
   @classmethod
-  def FilterSourceFile(cls, affected_file, white_list=(), black_list=()):
+  def FilterSourceFile(cls, affected_file, files_to_check=(),
+                       files_to_skip=()):
     # pylint: disable=unused-argument
     return True