Web MIDI: dispatch MIDIConnectionEvent

Source/modules/webmidi/MIDIConnectionEvent.h

Index: Source/modules/webmidi/MIDIConnectionEvent.h
diff --git a/Source/modules/webmidi/MIDIConnectionEvent.h b/Source/modules/webmidi/MIDIConnectionEvent.h
index d5f24083964ec79bc94456de519fb9053a48a47d..9d6c25367b296db66dc841546cb3b0f7a89fb768 100644
--- a/Source/modules/webmidi/MIDIConnectionEvent.h
+++ b/Source/modules/webmidi/MIDIConnectionEvent.h
@@ -41,9 +41,20 @@ class MIDIConnectionEventInit;
 class MIDIConnectionEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<MIDIConnectionEvent> create();
-    static PassRefPtrWillBeRawPtr<MIDIConnectionEvent> create(const AtomicString&, MIDIPort*);
-    static PassRefPtrWillBeRawPtr<MIDIConnectionEvent> create(const AtomicString&, const MIDIConnectionEventInit&);
+    static PassRefPtrWillBeRawPtr<MIDIConnectionEvent> create()
+    {
+        return adoptRefWillBeNoop(new MIDIConnectionEvent());
+    }
+
+    static PassRefPtrWillBeRawPtr<MIDIConnectionEvent> create(MIDIPort* port)
+    {
+        return adoptRefWillBeNoop(new MIDIConnectionEvent(port));
+    }
+
+    static PassRefPtrWillBeRawPtr<MIDIConnectionEvent> create(const AtomicString& type, const MIDIConnectionEventInit& initializer)
+    {
+        return adoptRefWillBeNoop(new MIDIConnectionEvent(type, initializer));
+    }
 
     MIDIPort* port() { return m_port; }
 
@@ -52,8 +63,13 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    MIDIConnectionEvent();
-    MIDIConnectionEvent(const AtomicString&, MIDIPort*);
+    MIDIConnectionEvent()
+        : Event(EventTypeNames::statechange, false, false) { }
+
+    MIDIConnectionEvent(MIDIPort* port)
+        : Event(EventTypeNames::statechange, false, false)
+        , m_port(port) { }
+
     MIDIConnectionEvent(const AtomicString&, const MIDIConnectionEventInit&);
 
     PersistentWillBeMember<MIDIPort> m_port;