Allow extensions to specify that they are not allowed in incognito mode.

extensions/common/manifest_constants.cc

 // Copyright 2013 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.
 
 #include "extensions/common/manifest_constants.h"
 
 namespace extensions {
 
 namespace manifest_keys {
 
@@ skipping 177 matching lines @@
 const char kFileSystemProviderCapabilities[] =
     "file_system_provider_capabilities";
 #endif
 
 }  // namespace manifest_keys
 
 namespace manifest_values {
 
 const char kApiKey[] = "api_key";
 const char kBrowserActionCommandEvent[] = "_execute_browser_action";
+const char kIncognitoNotAllowed[] = "not_allowed";
 const char kIncognitoSplit[] = "split";
 const char kIncognitoSpanning[] = "spanning";
 const char kIsolatedStorage[] = "storage";
 const char kKeybindingPlatformChromeOs[] = "chromeos";
 const char kKeybindingPlatformDefault[] = "default";
 const char kKeybindingPlatformLinux[] = "linux";
 const char kKeybindingPlatformMac[] = "mac";
 const char kKeybindingPlatformWin[] = "windows";
 const char kKeyAlt[] = "Alt";
 const char kKeyComma[] = "Comma";
@@ skipping 513 matching lines @@
     "'file_system_provider_capabilities' section to be specified in the "
     "manifest.";
 const char kInvalidFileSystemProviderMissingPermission[] =
     "The 'file_system_provider_capabilities' section requires the "
     "'fileSystemProvider' permission to be specified in the manifest.";
 #endif
 
 }  // namespace manifest_errors
 
 }  // namespace extensions