Web MIDI: implement MIDIMessageEvent

Source/bindings/derived_sources.gyp

 #
 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 161 matching lines @@
         'variables': {
           'generator_include_dirs': [
             '--include', '../modules/filesystem',
             '--include', '../modules/indexeddb',
             '--include', '../modules/mediasource',
             '--include', '../modules/mediastream',
             '--include', '../modules/navigatorcontentutils',
             '--include', '../modules/notifications',
             '--include', '../modules/webaudio',
             '--include', '../modules/webdatabase',
+            '--include', '../modules/webmidi',
             '--include', '../core/css',
             '--include', '../core/dom',
             '--include', '../core/fileapi',
             '--include', '../core/html',
             '--include', '../core/page',
             '--include', '../core/plugins',
             '--include', '../core/storage',
             '--include', '../core/svg',
             '--include', '../core/testing',
             '--include', '../core/workers',
@@ skipping 27 matching lines @@
           '--additionalIdlFiles',
           '<(webcore_test_support_idl_files)',
           '<(RULE_INPUT_PATH)',
           '<@(preprocessor)',
         ],
         'message': 'Generating binding from <(RULE_INPUT_PATH)',
       }],
     },
   ],
 }