Add sysexEnabled readonly attribute to MIDIAccess

Source/modules/webmidi/MIDIClientMock.cpp

 /*
  * 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 38 matching lines @@
     m_allowed = allowed;
 }
 
 void MIDIClientMock::resetMock()
 {
     m_allowed = false;
 }
 
 void MIDIClientMock::requestSysExPermission(PassRefPtrWillBeRawPtr<MIDIAccess> access)
 {
-    access->setSysExEnabled(m_allowed);
+    access->setSysexEnabled(m_allowed);
 }
 
 void MIDIClientMock::cancelSysExPermissionRequest(MIDIAccess*)
 {
 }
 
 } // WebCore