[v8 gc] Introduce a base class for all objects that can have pending activity

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

 /*
  * 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
@@ skipping 11 matching lines @@
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef AudioScheduledSourceNode_h
 #define AudioScheduledSourceNode_h
 
+#include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "modules/webaudio/AudioSourceNode.h"
 
 namespace blink {
 
 class AbstractAudioContext;
 class AudioBus;
 
 class AudioScheduledSourceHandler : public AudioHandler {
 public:
     // These are the possible states an AudioScheduledSourceNode can be in:
@@ skipping 71 matching lines @@
     // has been reached.
     double m_endTime; // in seconds
 
     static const double UnknownTime;
 private:
     // This is accessed by both the main thread and audio thread.  Use the setter and getter to
     // protect the access to this!
     int m_playbackState;
 };
 
-class AudioScheduledSourceNode : public AudioSourceNode {
+class AudioScheduledSourceNode : public AudioSourceNode, public ActiveScriptWrappable {
 public:
     void start(ExceptionState&);
     void start(double when, ExceptionState&);
     void stop(ExceptionState&);
     void stop(double when, ExceptionState&);
 
     EventListener* onended();
     void setOnended(PassRefPtrWillBeRawPtr<EventListener>);
 
-    // ScriptWrappable
+    // ActiveScriptWrappable
     bool hasPendingActivity() const final;
 
 protected:
     explicit AudioScheduledSourceNode(AbstractAudioContext&);
     AudioScheduledSourceHandler& audioScheduledSourceHandler() const;
 };
 
 } // namespace blink
 
 #endif // AudioScheduledSourceNode_h