Wire up an api to darken screen for accessibility

chrome/browser/resources/chromeos/chromevox/tools/check_chromevox.py

 #!/usr/bin/env python
 
 # 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.
 
 '''Uses the closure compiler to check the ChromeVox javascript files.
 
 With no arguments, checks all ChromeVox scripts.  If any arguments are
 specified, only scripts that include any of the specified files will be
@@ skipping 23 matching lines @@
   return os.path.relpath(os.path.join(_SCRIPT_DIR, '..', path))
 
 
 def ChromeRootPath(path='.'):
   '''Converts a path relative to the top-level chromevox directory to a
   path relative to the current directory.
   '''
   return os.path.relpath(os.path.join(_CHROME_SOURCE_DIR, path))
 
 
+# AccessibilityPrivate externs file.
+_ACCESSIBILITY_PRIVATE_EXTERNS = (
+    ChromeRootPath(
+        'third_party/closure_compiler/externs/accessibility_private.js'))
+
 # Automation API externs file.
 _AUTOMATION_EXTERNS = (
     ChromeRootPath('third_party/closure_compiler/externs/automation.js'))
 
 # MetricsPrivate externs file.
 _METRICS_PRIVATE_EXTERNS = (
     ChromeRootPath('third_party/closure_compiler/externs/metrics_private.js'))
 
 # Additional chrome extension api externs file.
 _CHROME_EXTENSIONS_EXTERNS = (
     ChromeRootPath('third_party/closure_compiler/externs/chrome_extensions.js'))
 
 
 # Externs common to many ChromeVox scripts.
 _COMMON_EXTERNS = [
     CVoxPath('common/externs.js'),
     CVoxPath('common/chrome_extension_externs.js'),
     CVoxPath('chromevox/background/externs.js'),
     CVoxPath('chromevox/injected/externs.js'),
     CVoxPath('host/chrome/externs.js'),
+    _ACCESSIBILITY_PRIVATE_EXTERNS,
     _AUTOMATION_EXTERNS,
     _CHROME_EXTENSIONS_EXTERNS,
     _METRICS_PRIVATE_EXTERNS]
 
 # List of top-level scripts and externs that we can check.
 _TOP_LEVEL_SCRIPTS = [
     [[CVoxPath('chromevox/background/kbexplorer_loader.js')], _COMMON_EXTERNS],
     [[CVoxPath('chromevox/background/options_loader.js')], _COMMON_EXTERNS],
     [[CVoxPath('chromevox/injected/loader.js')], _COMMON_EXTERNS],
     [[CVoxPath('cvox2/background/loader.js')], _COMMON_EXTERNS],
@@ skipping 68 matching lines @@
   if len(args) > 0:
     changed_paths = (os.path.relpath(p) for p in args)
   success, output = CheckChromeVox(changed_paths)
   if len(output) > 0:
     print output
   return int(not success)
 
 
 if __name__ == '__main__':
   sys.exit(main())