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

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index e2e042336926e54a01f47dd33769c9a534c7c92c..d6fce1a5f0f1bd875381b0bac199f5f97a91f81c 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -2200,6 +2200,20 @@ def _CheckForWindowsLineEndings(input_api, output_api):
   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))
@@ -2208,6 +2222,7 @@ def CheckChangeOnUpload(input_api, output_api):
       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