Web MIDI: MIDIPort doesn't have to be ActiveDOMObject

Source/modules/webmidi/MIDIInput.h

Index: Source/modules/webmidi/MIDIInput.h
diff --git a/Source/modules/webmidi/MIDIInput.h b/Source/modules/webmidi/MIDIInput.h
index 4e7aff490d4b2931e3960bfd72f345c37f48e867..4337a28ce34112db66fe11126384207a84280ccd 100644
--- a/Source/modules/webmidi/MIDIInput.h
+++ b/Source/modules/webmidi/MIDIInput.h
@@ -37,11 +37,10 @@
 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);
@@ -52,12 +51,8 @@ public:
     // |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;