Split "Online" and "Offline" AudioContext processing

Source/modules/webaudio/DelayNode.h

 /*
  * 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 11 matching lines @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef DelayNode_h
 #define DelayNode_h
 
 #include "modules/webaudio/AudioNode.h"
 
 namespace blink {
 
+class AbstractAudioContext;
 class ExceptionState;
 
 class DelayNode final : public AudioNode {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static DelayNode* create(AudioContext&, float sampleRate, double maxDelayTime, ExceptionState&);
+    static DelayNode* create(AbstractAudioContext&, float sampleRate, double maxDelayTime, ExceptionState&);
     DECLARE_VIRTUAL_TRACE();
     AudioParam* delayTime();
 
 private:
-    DelayNode(AudioContext&, float sampleRate, double maxDelayTime);
+    DelayNode(AbstractAudioContext&, float sampleRate, double maxDelayTime);
 
     Member<AudioParam> m_delayTime;
 };
 
 } // namespace blink
 
 #endif // DelayNode_h