Web MIDI: add blink APIs to notify device connection events

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 155 matching lines @@
 
     String getPositionString() { return "at index " + String::number(m_offset) + " (" + String::number(m_data[m_offset]) + ")."; }
 
     const unsigned char* m_data;
     const size_t m_length;
     size_t m_offset;
 };
 
 } // namespace
 
-MIDIOutput* MIDIOutput::create(MIDIAccess* access, unsigned portIndex, const String& id, const String& manufacturer, const String& name, const String& version)
+MIDIOutput* MIDIOutput::create(MIDIAccess* access, unsigned portIndex, const String& id, const String& manufacturer, const String& name, const String& version, bool isActive)
 {
     ASSERT(access);
-    return new MIDIOutput(access, portIndex, id, manufacturer, name, version);
+    return new MIDIOutput(access, portIndex, id, manufacturer, name, version, isActive);
 }
 
-MIDIOutput::MIDIOutput(MIDIAccess* access, unsigned portIndex, const String& id, const String& manufacturer, const String& name, const String& version)
-    : MIDIPort(access, id, manufacturer, name, MIDIPortTypeOutput, version)
+MIDIOutput::MIDIOutput(MIDIAccess* access, unsigned portIndex, const String& id, const String& manufacturer, const String& name, const String& version, bool isActive)
+    : MIDIPort(access, id, manufacturer, name, MIDIPortTypeOutput, version, isActive)
     , m_portIndex(portIndex)
 {
 }
 
 MIDIOutput::~MIDIOutput()
 {
 }
 
 void MIDIOutput::send(Uint8Array* array, double timestamp, ExceptionState& exceptionState)
 {
@@ skipping 35 matching lines @@
 {
     send(unsignedData, 0.0, exceptionState);
 }
 
 void MIDIOutput::trace(Visitor* visitor)
 {
     MIDIPort::trace(visitor);
 }
 
 } // namespace blink