Valgrind/Heapchecker: Only run presubmit check on suppression files.

tools/heapcheck/PRESUBMIT.py

 # Copyright (c) 2011 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.
 
 """
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details on the presubmit API built into gcl.
 """
 
+import re
+
 def CheckChange(input_api, output_api):
   """Checks the heapcheck suppressions files for bad data."""
+  sup_regex = re.compile('suppressions.*\.txt$')
   suppressions = {}
   errors = []
   check_for_heapcheck = False
   skip_next_line = False
-  for f in filter(lambda x: x.LocalPath().endswith('.txt'),
+  for f in filter(lambda x: sup_regex.search(x.LocalPath()),
                   input_api.AffectedFiles()):
     for line, line_num in zip(f.NewContents(),
                               xrange(1, len(f.NewContents()) + 1)):
-
       line = line.lstrip()
       if line.startswith('#') or not line:
         continue
 
       if skip_next_line:
         if suppressions.has_key(line):
           errors.append('suppression with name "%s" at %s line %s has already '
                         'been defined at line %s' % (line, f.LocalPath(),
                                                      line_num,
                                                      suppressions[line][1]))
@@ skipping 18 matching lines @@
                                                             line_num))
   if errors:
     return [output_api.PresubmitError('\n'.join(errors))]
   return []
 
 def CheckChangeOnUpload(input_api, output_api):
   return CheckChange(input_api, output_api)
 
 def CheckChangeOnCommit(input_api, output_api):
   return CheckChange(input_api, output_api)