ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/modules/webaudio/AudioScheduledSourceNode.cpp

 /*
  * Copyright (C) 2012, 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:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 218 matching lines @@
 
 void AudioScheduledSourceHandler::notifyEnded() {
   DCHECK(isMainThread());
   if (node())
     node()->dispatchEvent(Event::create(EventTypeNames::ended));
 }
 
 // ----------------------------------------------------------------
 
 AudioScheduledSourceNode::AudioScheduledSourceNode(BaseAudioContext& context)
-    : AudioSourceNode(context), ActiveScriptWrappable(this) {}
+    : AudioSourceNode(context),
+      ActiveScriptWrappable<AudioScheduledSourceNode>(this) {}
 
 AudioScheduledSourceHandler&
 AudioScheduledSourceNode::audioScheduledSourceHandler() const {
   return static_cast<AudioScheduledSourceHandler&>(handler());
 }
 
 void AudioScheduledSourceNode::start(ExceptionState& exceptionState) {
   start(0, exceptionState);
 }
 
@@ skipping 24 matching lines @@
   // playback state if the context is closed.
   if (context()->isContextClosed())
     return false;
 
   // If a node is scheduled or playing, do not collect the node prematurely
   // even its reference is out of scope. Then fire onended event if assigned.
   return audioScheduledSourceHandler().isPlayingOrScheduled();
 }
 
 }  // namespace blink