Add presubmit check and automatic update script for ExtensionPermission enum.

extensions/browser/PRESUBMIT_test_new_file_8.txt

-// 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.
-
-#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_
-
-
-namespace extensions {
-namespace functions {
-
-//
-// This is some comment.
-// This is another comment.
-// This is yet another comment.
-//
-enum HistogramValue {
-  UNKNOWN = 0,
-  WEBNAVIGATION_GETALLFRAMES,
-  BROWSINGDATA_REMOVEWEBSQL,
-  BROWSINGDATA_REMOVEWEBSQL2,
-  WALLPAPERPRIVATE_SETCUSTOMWALLPAPERLAYOUT,
-  DOWNLOADSINTERNAL_DETERMINEFILENAME,
-  SYNCFILESYSTEM_GETFILESYNCSTATUSES,
-  MEDIAGALLERIESPRIVATE_GETHANDLERS,
-  WALLPAPERPRIVATE_RESETWALLPAPER,
-  // Last entry: Add new entries above and ensure to update
-  // tools/metrics/histograms/histograms/histograms.xml.
-  ENUM_BOUNDARY
-};
-
-}  // namespace functions
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_