Web MIDI: MIDIInput/MIDIOutput should not have reference to MIDIAccess

Source/modules/webmidi/MIDIOutput.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 21 matching lines @@
 #include "modules/webmidi/MIDIOutput.h"
 
 #include "bindings/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
 #include "modules/webmidi/MIDIAccess.h"
 
 namespace WebCore {
 
 PassRefPtr<MIDIOutput> MIDIOutput::create(MIDIAccess* access, unsigned portIndex, ScriptExecutionContext* context, const String& id, const String& manufacturer, const String& name, const String& version)
 {
+    ASSERT(access);
     return adoptRef(new MIDIOutput(access, portIndex, context, id, manufacturer, name, version));
 }
 
 MIDIOutput::MIDIOutput(MIDIAccess* access, unsigned portIndex, ScriptExecutionContext* context, const String& id, const String& manufacturer, const String& name, const String& version)
     : MIDIPort(context, id, manufacturer, name, MIDIPortTypeOutput, version)
     , m_access(access)
     , m_portIndex(portIndex)
 {
     ScriptWrappable::init(this);
 }
@@ skipping 40 matching lines @@
 {
     send(data, 0, es);
 }
 
 void MIDIOutput::send(Vector<unsigned> unsignedData, ExceptionState& es)
 {
     send(unsignedData, 0, es);
 }
 
 } // namespace WebCore