Keep AudioScheduledSourceNode alive until onended is called.

Source/modules/webaudio/AudioBufferSourceNode.cpp

 /*
  * Copyright (C) 2010, 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 57 matching lines @@
 {
     ScriptWrappable::init(this);
     setNodeType(NodeTypeAudioBufferSource);
 
     m_gain = AudioParam::create(context, "gain", 1.0, 0.0, 1.0);
     m_playbackRate = AudioParam::create(context, "playbackRate", 1.0, 0.0, MaxRate);
 
     // Default to mono.  A call to setBuffer() will set the number of output channels to that of the buffer.
     addOutput(adoptPtr(new AudioNodeOutput(this, 1)));
 
+    suspendIfNeeded();
     initialize();
 }
 
 AudioBufferSourceNode::~AudioBufferSourceNode()
 {
     clearPannerNode();
     uninitialize();
 }
 
 void AudioBufferSourceNode::process(size_t framesToProcess)
@@ skipping 391 matching lines @@
 void AudioBufferSourceNode::finish()
 {
     clearPannerNode();
     ASSERT(!m_pannerNode);
     AudioScheduledSourceNode::finish();
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)