Adds new logging type SYSLOG which logs to the system log.

PRESUBMIT.py

 # Copyright (c) 2012 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.
 
 """Top-level presubmit script for Chromium.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into depot_tools.
 """
 
@@ skipping 2018 matching lines @@
     fp.close()
 
   if problems:
     return [output_api.PresubmitPromptWarning('Are you sure that you want '
         'these files to contain Windows style line endings?\n' +
         '\n'.join(problems))]
 
   return []
 
 
+def _CheckSyslogUseWarning(input_api, output_api, source_file_filter=None,
+                           lint_filters=None, verbose_level=None):
+  """Checks that all source files use SYSLOG properly."""
+  syslog_files = []
+  for f in input_api.AffectedSourceFiles(source_file_filter):
+    if 'SYSLOG' in input_api.ReadFile(f, 'rb'):
+      syslog_files.append(f.LocalPath())
+  if syslog_files:
+    return [output_api.PresubmitPromptWarning(
+        'Please make sure there are no privacy sensitive bits of data in SYSLOG'
+        ' calls.\nFiles to check:\n', items=syslog_files)]
+  return []
+
+
 def CheckChangeOnUpload(input_api, output_api):
   results = []
   results.extend(_CommonChecks(input_api, output_api))
   results.extend(_CheckValidHostsInDEPS(input_api, output_api))
   results.extend(_CheckJavaStyle(input_api, output_api))
   results.extend(
       input_api.canned_checks.CheckGNFormatted(input_api, output_api))
   results.extend(_CheckUmaHistogramChanges(input_api, output_api))
   results.extend(_AndroidSpecificOnUploadChecks(input_api, output_api))
+  results.extend(_CheckSyslogUseWarning(input_api, output_api))
   return results
 
 
 def GetTryServerMasterForBot(bot):
   """Returns the Try Server master for the given bot.
 
   It tries to guess the master from the bot name, but may still fail
   and return None.  There is no longer a default master.
   """
   # Potentially ambiguous bot names are listed explicitly.
@@ skipping 32 matching lines @@
   results.extend(input_api.canned_checks.CheckTreeIsOpen(
       input_api,
       output_api,
       json_url='http://chromium-status.appspot.com/current?format=json'))
 
   results.extend(input_api.canned_checks.CheckChangeHasBugField(
       input_api, output_api))
   results.extend(input_api.canned_checks.CheckChangeHasDescription(
       input_api, output_api))
   return results