Change the default source lists;

presubmit_support.py

 #!/usr/bin/python
 # Copyright (c) 2006-2009 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.
 
 """Enables directory-specific presubmit checks to run at upload and/or commit.
 """
 
 __version__ = '1.3.4'
 
@@ skipping 135 matching lines @@
   know stuff about the change they're looking at.
   """
 
   # File extensions that are considered source files from a style guide
   # perspective. Don't modify this list from a presubmit script!
   DEFAULT_WHITE_LIST = (
       # C++ and friends
       r".*\.c", r".*\.cc", r".*\.cpp", r".*\.h", r".*\.m", r".*\.mm",
       r".*\.inl", r".*\.asm", r".*\.hxx", r".*\.hpp",
       # Scripts
-      r".*\.js", r".*\.py", r".*\.json", r".*\.sh", r".*\.rb",
-      # No extension at all
+      r".*\.js", r".*\.py", r".*\.sh", r".*\.rb", r".*\.pl", r".*\.pm",
+      # No extension at all, note that ALL CAPS files are black listed
       r"(^|.*[\\\/])[^.]+$",
       # Other
-      r".*\.java", r".*\.mk", r".*\.am", r".*\.txt",
+      r".*\.java", r".*\.mk", r".*\.am",
   )
 
   # Path regexp that should be excluded from being considered containing source
   # files. Don't modify this list from a presubmit script!
   DEFAULT_BLACK_LIST = (
       r".*\bexperimental[\\\/].*",
       r".*\bthird_party[\\\/].*",
       # Output directories (just in case)
       r".*\bDebug[\\\/].*",
       r".*\bRelease[\\\/].*",
@@ skipping 877 matching lines @@
                                options.commit,
                                options.verbose,
                                sys.stdout,
                                sys.stdin,
                                options.default_presubmit,
                                options.may_prompt)
 
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))