Histograms.xml python script housekeeping

tools/metrics/histograms/update_bad_message_reasons.py

+# Copyright 2015 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.
+
+"""Updates the various BadMessage enums in histograms.xml file with values read
+from the corresponding bad_message.h files.
+
+If the file was pretty-printed, the updated version is pretty-printed too.
+"""
+
+import os
+import sys
+
+from update_histogram_enum import UpdateHistogramEnum
+
+if __name__ == '__main__':
+  if len(sys.argv) > 1:
+    print >>sys.stderr, 'No arguments expected!'
+    sys.stderr.write(__doc__)
+    sys.exit(1)
+
+  histograms = {
+    'chrome/browser/bad_message.h': 'BadMessageReasonChrome',
+    'content/browser/bad_message.h': 'BadMessageReasonContent',
+    'components/nacl/browser/bad_message.h': 'BadMessageReasonNaCl',
+    'extensions/browser/bad_message.h': 'BadMessageReasonExtensions',
+  }
+
+  for header_file, histogram_name in histograms.items():
+    UpdateHistogramEnum(histogram_enum_name=histogram_name,
+                        source_enum_path=header_file,
+                        start_marker='^enum BadMessageReason {',
+                        end_marker='^BAD_MESSAGE_MAX')