Add presubmit check and automatic update script for ExtensionPermission enum.

extensions/common/permissions/PRESUBMIT.py

+# Copyright 2014 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.
+
+"""Chromium presubmit script for src/extensions/common/permissions.
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
+for more details on the presubmit API built into gcl.
+"""
+import sys
+
+def GetPreferredTrySlaves():
+  return ['linux_chromeos']
+
+def _CreatePermissionMessageEnumChecker(input_api, output_api):
+  original_sys_path = sys.path
+
+  try:
+    sys.path.append(input_api.os_path.join(
+        input_api.PresubmitLocalPath(), '..', '..', '..', 'tools',
+        'strict_enum_value_checker'))
+    from strict_enum_value_checker import StrictEnumValueChecker
+  finally:
+    sys.path = original_sys_path
+
+  return StrictEnumValueChecker(input_api, output_api,
+      start_marker='enum ID {', end_marker='  kEnumBoundary',
+      path='extensions/common/permissions/permission_message.h')
+
+def CheckChangeOnUpload(input_api, output_api):
+    return _CreatePermissionMessageEnumChecker(input_api, output_api).Run()
+