Add nativeMessaging extension permission

chrome/common/extensions/permissions/api_permission.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_PERMISSIONS_API_PERMISSION_H_
 #define CHROME_COMMON_EXTENSIONS_PERMISSIONS_API_PERMISSION_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 69 matching lines @@
     kHistory,
     kIdle,
     kInput,
     kInputMethodPrivate,
     kManagedModePrivate,
     kManagement,
     kMediaGalleries,
     kMediaGalleriesPrivate,
     kMediaPlayerPrivate,
     kMetricsPrivate,
+    kNativeMessaging,
     kNetworkingPrivate,
     kNotification,
     kPageCapture,
     kPointerLock,
     kPlugin,
     kPrivacy,
     kProxy,
     kPushMessaging,
     kRtcPrivate,
     kScreensaver,
@@ skipping 110 matching lines @@
 
     // Indicates if the permission implies full access (native code).
     kFlagImpliesFullAccess = 1 << 0,
 
     // Indicates if the permission implies full URL access.
     kFlagImpliesFullURLAccess = 1 << 1,
 
     // Indicates that extensions cannot specify the permission as optional.
     kFlagCannotBeOptional = 1 << 3,
 
-    // Indicates that extensions cannot specify the permission as optional.
+    // Indicates that extensions must specify the permission as optional.
     kFlagMustBeOptional = 1 << 4
   };
 
   typedef APIPermission* (*APIPermissionConstructor)(const APIPermissionInfo*);
 
   typedef std::set<APIPermission::ID> IDSet;
 
   ~APIPermissionInfo();
 
   // Creates a APIPermission instance.
@@ skipping 59 matching lines @@
   const char* const name_;
   const int flags_;
   const int l10n_message_id_;
   const PermissionMessage::ID message_id_;
   const APIPermissionConstructor api_permission_constructor_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_PERMISSIONS_API_PERMISSION_H_