Keep AudioScheduledSourceNode alive until onended is called.

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 "core/dom/ActiveDOMObject.h"
 #include "modules/webaudio/AudioSourceNode.h"
 
 namespace WebCore {
 
 class AudioBus;
 
-class AudioScheduledSourceNode : public AudioSourceNode {
+class AudioScheduledSourceNode : public AudioSourceNode, public ActiveDOMObject {
 public:
     // These are the possible states an AudioScheduledSourceNode can be in:
     //
     // UNSCHEDULED_STATE - Initial playback state. Created, but not yet scheduled.
     // SCHEDULED_STATE - Scheduled to play (via noteOn() or noteGrainOn()), but not yet playing.
     // PLAYING_STATE - Generating sound.
     // FINISHED_STATE - Finished generating sound.
     //
     // The state can only transition to the next state, except for the FINISHED_STATE which can
     // never be changed.
     enum PlaybackState {
         // These must be defined with the same names and values as in the .idl file.
         UNSCHEDULED_STATE = 0,
         SCHEDULED_STATE = 1,
         PLAYING_STATE = 2,
         FINISHED_STATE = 3
     };
 
     AudioScheduledSourceNode(AudioContext*, float sampleRate);
 
     // Scheduling.
     void start(double when);
-    void stop(double when);
+    void stopNote(double when);
 
     void noteOn(double when);
     void noteOff(double when);
 
     unsigned short playbackState() const { return static_cast<unsigned short>(m_playbackState); }
     bool isPlayingOrScheduled() const { return m_playbackState == PLAYING_STATE || m_playbackState == SCHEDULED_STATE; }
     bool hasFinished() const { return m_playbackState == FINISHED_STATE; }
 
     EventListener* onended(DOMWrapperWorld* isolatedWorld) { return getAttributeEventListener(eventNames().endedEvent, isolatedWorld); }
     void setOnended(PassRefPtr<EventListener>, DOMWrapperWorld* isolatedWorld = 0);
 
+    virtual ScriptExecutionContext* scriptExecutionContext() const OVERRIDE;
+    virtual void stop() OVERRIDE;
+
 protected:
     // Get frame information for the current time quantum.
     // We handle the transition into PLAYING_STATE and FINISHED_STATE here,
     // zeroing out portions of the outputBus which are outside the range of startFrame and endFrame.
     //
     // Each frame time is relative to the context's currentSampleFrame().
     // quantumFrameOffset    : Offset frame in this time quantum to start rendering.
     // nonSilentFramesToProcess : Number of frames rendering non-silence (will be <= quantumFrameSize).
     void updateSchedulingInfo(size_t quantumFrameSize,
                               AudioBus* outputBus,
@@ skipping 10 matching lines @@
 
     // m_startTime is the time to start playing based on the context's timeline (0 or a time less than the context's current time means "now").
     double m_startTime; // in seconds
 
     // m_endTime is the time to stop playing based on the context's timeline (0 or a time less than the context's current time means "now").
     // If it hasn't been set explicitly, then the sound will not stop playing (if looping) or will stop when the end of the AudioBuffer
     // has been reached.
     double m_endTime; // in seconds
 
     bool m_hasEndedListener;
+    bool m_notifyingEndedListener;
 
     static const double UnknownTime;
 };
 
 } // namespace WebCore
 
 #endif // AudioScheduledSourceNode_h