👟 Disable pydeps presumbit on Mac.

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 874734e4977c739df019f2d33496260820e4724d..29ae697e322af34aec02e27eb9822b307eb38e76 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -1606,8 +1606,9 @@ class PydepsChecker(object):
 def _CheckPydepsNeedsUpdating(input_api, output_api, checker_for_tests=None):
   """Checks if a .pydeps file needs to be regenerated."""
   # This check is mainly for Android, and involves paths not only in the
-  # PRESUBMIT.py, but also in the .pydeps files. Just skip it for Windows.
-  if input_api.platform == 'win32':
+  # PRESUBMIT.py, but also in the .pydeps files. It doesn't work on Windows and
+  # Mac, so skip it on other platforms.
+  if input_api.platform != 'linux2':
     return []
   # TODO(agrieve): Update when there's a better way to detect this: crbug/570091
   is_android = input_api.os_path.exists('third_party/android_tools')