Enable runtime switching between ChromeVox and ChromeVox next via command line.

chrome/common/extensions/extension_constants.h

 // Copyright (c) 2012 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_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 188 matching lines @@
 extern const char kChromeVoxExtensionId[];
 
 #if defined(OS_CHROMEOS)
 // Path to preinstalled ChromeVox screen reader extension (relative to
 // |chrome::DIR_RESOURCES|).
 extern const char kChromeVoxExtensionPath[];
 // Name of ChromeVox manifest file.
 extern const char kChromeVoxManifestFilename[];
 // Name of ChromeVox guest manifest file.
 extern const char kChromeVoxGuestManifestFilename[];
+// Name of ChromeVox next manifest file.
+extern const char kChromeVoxNextManifestFilename[];
+// Name of ChromeVox next guest manifest file.
+extern const char kChromeVoxNextGuestManifestFilename[];
 // Extension id, path (relative to |chrome::DIR_RESOURCES|) and IME engine
 // id for the builtin-in Braille IME extension.
 extern const char kBrailleImeExtensionId[];
 extern const char kBrailleImeExtensionPath[];
 extern const char kBrailleImeEngineId[];
 // Path to preinstalled Connectivity Diagnostics extension.
 extern const char kConnectivityDiagnosticsPath[];
 extern const char kConnectivityDiagnosticsKioskPath[];
 extern const char kConnectivityDiagnosticsLauncherPath[];
 // Path to preinstalled speech synthesis extension.
@@ skipping 63 matching lines @@
   LAUNCH_CONTAINER_PANEL,
   LAUNCH_CONTAINER_TAB,
   // For platform apps, which don't actually have a container (they just get a
   // "onLaunched" event).
   LAUNCH_CONTAINER_NONE
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_