Web MIDI: MIDIPort doesn't have to be ActiveDOMObject

Source/modules/webmidi/MIDIInput.h

 /*
  * 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 19 matching lines @@
 
 #ifndef MIDIInput_h
 #define MIDIInput_h
 
 #include "core/events/EventTarget.h"
 #include "modules/webmidi/MIDIPort.h"
 
 namespace WebCore {
 
 class MIDIAccess;
-class ExecutionContext;
 
 class MIDIInput FINAL : public MIDIPort {
 public:
-    static PassRefPtr<MIDIInput> create(MIDIAccess*, ExecutionContext*, const String& id, const String& manufacturer, const String& name, const String& version);
+    static PassRefPtr<MIDIInput> create(MIDIAccess*, const String& id, const String& manufacturer, const String& name, const String& version);
     virtual ~MIDIInput() { }
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(midimessage);
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE { return EventTargetNames::MIDIInput; }
 
     // |timeStamp| is a DOMHighResTimeStamp in the time coordinate system of performance.now().
     void didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp);
 
-    MIDIAccess* midiAccess() const { return m_access; }
-
 private:
-    MIDIInput(MIDIAccess*, ExecutionContext*, const String& id, const String& manufacturer, const String& name, const String& version);
-
-    MIDIAccess* m_access;
+    MIDIInput(MIDIAccess*, const String& id, const String& manufacturer, const String& name, const String& version);
 };
 
 typedef Vector<RefPtr<MIDIInput> > MIDIInputVector;
 
 } // namespace WebCore
 
 #endif // MIDIInput_h