ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/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 28 matching lines @@
 
 namespace blink {
 
 MIDIPort::MIDIPort(MIDIAccess* access,
                    const String& id,
                    const String& manufacturer,
                    const String& name,
                    TypeCode type,
                    const String& version,
                    PortState state)
-    : ActiveScriptWrappable(this),
+    : ActiveScriptWrappable<MIDIPort>(this),
       SuspendableObject(access->getExecutionContext()),
       m_id(id),
       m_manufacturer(manufacturer),
       m_name(name),
       m_type(type),
       m_version(version),
       m_access(this, access),
       m_connection(ConnectionStateClosed) {
   DCHECK(access);
   DCHECK(type == TypeInput || type == TypeOutput);
@@ skipping 145 matching lines @@
   DCHECK(state != PortState::DISCONNECTED || connection != ConnectionStateOpen);
   if (m_state == state && m_connection == connection)
     return;
   m_state = state;
   m_connection = connection;
   dispatchEvent(MIDIConnectionEvent::create(this));
   m_access->dispatchEvent(MIDIConnectionEvent::create(this));
 }
 
 }  // namespace blink