Web MIDI: Add MIDIPortState state attribute to MIDIPort

Source/modules/webmidi/MIDIPort.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 30 matching lines @@
     , m_name(name)
     , m_type(type)
     , m_version(version)
     , m_access(access)
     , m_isActive(isActive)
 {
     ASSERT(access);
     ASSERT(type == MIDIPortTypeInput || type == MIDIPortTypeOutput);
 }
 
+String MIDIPort::state() const
+{
+    // FIXME: Support complete MIDIPortState once Blink API is updated.
+    return m_isActive ? "opened" : "disconnected";
+}
+
 String MIDIPort::type() const
 {
     switch (m_type) {
     case MIDIPortTypeInput:
         return "input";
     case MIDIPortTypeOutput:
         return "output";
     default:
         ASSERT_NOT_REACHED();
     }
     return emptyString();
 }
 
 ExecutionContext* MIDIPort::executionContext() const
 {
     return m_access->executionContext();
 }
 
 DEFINE_TRACE(MIDIPort)
 {
     visitor->trace(m_access);
     RefCountedGarbageCollectedEventTargetWithInlineData<MIDIPort>::trace(visitor);
 }
 
 } // namespace blink