Add permission message for Music Manager Private API.

chrome/common/extensions/permissions/permission_message.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_PERMISSION_MESSAGE_H_
 #define CHROME_COMMON_EXTENSIONS_PERMISSIONS_PERMISSION_MESSAGE_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 44 matching lines @@
     kUsb,
     kSystemIndicator,
     kBluetoothDevice,
     kUsbDevice,
     kMediaGalleriesAllGalleriesWrite,
     kSystemInfoDisplay,
     kNativeMessaging,
     kSyncFileSystem,
     kAudio,
     kFavicon,
+    kMusicManagerPrivate,
     kEnumBoundary,
   };
 
   // Creates the corresponding permission message for a list of hosts. This is
   // simply a convenience method around the constructor, since the messages
   // change depending on what hosts are present.
   static PermissionMessage CreateFromHostList(
       const std::set<std::string>& hosts);
 
   // Creates the corresponding permission message.
@@ skipping 16 matching lines @@
  private:
   ID id_;
   string16 message_;
 };
 
 typedef std::vector<PermissionMessage> PermissionMessages;
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_PERMISSIONS_PERMISSION_MESSAGE_H_