Keep AudioSourceNode from premature GC with ScriptWrappable::hasPendingActivity()

third_party/WebKit/Source/modules/webaudio/AudioBufferSourceNode.idl

 /*
  * 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 15 matching lines @@
 interface AudioBufferSourceNode : AudioSourceNode {
     [RaisesException=Setter] attribute AudioBuffer buffer;
 
     readonly attribute AudioParam playbackRate;
     readonly attribute AudioParam detune;
 
     attribute boolean loop;
     attribute double loopStart;
     attribute double loopEnd;
 
-    [RaisesException] void start(optional double when, optional double grainOffset, optional double grainDuration);
-    [RaisesException] void stop(optional double when);
+    [RaisesException, ImplementedAs=startNode] void start(optional double when, optional double grainOffset, optional double grainDuration);
+    [RaisesException, ImplementedAs=stopNode] void stop(optional double when);
 
     attribute EventHandler onended;
 };