Web MIDI: final IDL updates to conform the latest WD for shipping

Source/modules/webmidi/MIDIPort.h

Index: Source/modules/webmidi/MIDIPort.h
diff --git a/Source/modules/webmidi/MIDIPort.h b/Source/modules/webmidi/MIDIPort.h
index f089cb706f4955c42f8a9d20e4c069fae81d0dc2..0e0807d82eba5667f64552ad9d7f053f45f90842 100644
--- a/Source/modules/webmidi/MIDIPort.h
+++ b/Source/modules/webmidi/MIDIPort.h
@@ -52,6 +52,7 @@ public:
 
     virtual ~MIDIPort() { }
 
+    String connection() const;
     String id() const { return m_id; }
     String manufacturer() const { return m_manufacturer; }
     String name() const { return m_name; }
@@ -78,9 +79,17 @@ protected:
     MIDIPort(MIDIAccess*, const String& id, const String& manufacturer, const String& name, MIDIPortTypeCode, const String& version, MIDIAccessor::MIDIPortState);
 
 private:
+    enum MIDIPortConnectionState {
+        MIDIPortConnectionStateOpen,
+        MIDIPortConnectionStateClosed,
+        MIDIPortConnectionStatePending
+    };
+
     ScriptPromise accept(ScriptState*);
     ScriptPromise reject(ScriptState*, ExceptionCode, const String& message);
 
+    void setStates(MIDIAccessor::MIDIPortState, MIDIPortConnectionState);
+
     String m_id;
     String m_manufacturer;
     String m_name;
@@ -88,6 +97,7 @@ private:
     String m_version;
     Member<MIDIAccess> m_access;
     MIDIAccessor::MIDIPortState m_state;
+    MIDIPortConnectionState m_connection;
 };
 
 } // namespace blink