Move the exception logic to the AudioNode creator

third_party/WebKit/Source/modules/webaudio/PannerNode.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 603 matching lines @@
 
     if (hasMoved) {
         m_lastPosition = currentPosition;
         m_lastOrientation = currentOrientation;
 
         markPannerAsDirty(PannerHandler::AzimuthElevationDirty | PannerHandler::DistanceConeGainDirty);
     }
 }
 // ----------------------------------------------------------------
 
-PannerNode::PannerNode(AbstractAudioContext& context, float sampleRate)
+PannerNode::PannerNode(AbstractAudioContext& context)
     : AudioNode(context)
     , m_positionX(AudioParam::create(context, ParamTypePannerPositionX, 0.0))
     , m_positionY(AudioParam::create(context, ParamTypePannerPositionY, 0.0))
     , m_positionZ(AudioParam::create(context, ParamTypePannerPositionZ, 0.0))
     , m_orientationX(AudioParam::create(context, ParamTypePannerOrientationX, 1.0))
     , m_orientationY(AudioParam::create(context, ParamTypePannerOrientationY, 0.0))
     , m_orientationZ(AudioParam::create(context, ParamTypePannerOrientationZ, 0.0))
 {
     setHandler(PannerHandler::create(
         *this,
-        sampleRate,
+        context.sampleRate(),
         m_positionX->handler(),
         m_positionY->handler(),
         m_positionZ->handler(),
         m_orientationX->handler(),
         m_orientationY->handler(),
         m_orientationZ->handler()));
 }
 
-PannerNode* PannerNode::create(AbstractAudioContext& context, float sampleRate)
+PannerNode* PannerNode::create(AbstractAudioContext& context, ExceptionState& exceptionState)
 {
-    return new PannerNode(context, sampleRate);
+    DCHECK(isMainThread());
+
+    if (context.isContextClosed()) {
+        context.throwExceptionForClosedState(exceptionState);
+        return nullptr;
+    }
+
+    return new PannerNode(context);
 }
 
 PannerHandler& PannerNode::pannerHandler() const
 {
     return static_cast<PannerHandler&>(handler());
 }
 
 String PannerNode::panningModel() const
 {
     return pannerHandler().panningModel();
@@ skipping 97 matching lines @@
     visitor->trace(m_positionZ);
 
     visitor->trace(m_orientationX);
     visitor->trace(m_orientationY);
     visitor->trace(m_orientationZ);
 
     AudioNode::trace(visitor);
 }
 
 } // namespace blink