ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/modules/webmidi/MIDIAccess.h

 /*
  * 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 34 matching lines @@
 
 namespace blink {
 
 class ExecutionContext;
 class MIDIInput;
 class MIDIInputMap;
 class MIDIOutput;
 class MIDIOutputMap;
 
 class MIDIAccess final : public EventTargetWithInlineData,
-                         public ActiveScriptWrappable,
+                         public ActiveScriptWrappable<MIDIAccess>,
                          public SuspendableObject,
                          public MIDIAccessorClient {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(MIDIAccess);
   USING_PRE_FINALIZER(MIDIAccess, dispose);
 
  public:
   static MIDIAccess* create(
       std::unique_ptr<MIDIAccessor> accessor,
       bool sysexEnabled,
@@ skipping 75 matching lines @@
   std::unique_ptr<MIDIAccessor> m_accessor;
   bool m_sysexEnabled;
   bool m_hasPendingActivity;
   HeapVector<Member<MIDIInput>> m_inputs;
   HeapVector<Member<MIDIOutput>> m_outputs;
 };
 
 }  // namespace blink
 
 #endif  // MIDIAccess_h