Split "Online" and "Offline" AudioContext processing

Source/modules/webaudio/DefaultAudioDestinationNode.h

Index: Source/modules/webaudio/DefaultAudioDestinationNode.h
diff --git a/Source/modules/webaudio/DefaultAudioDestinationNode.h b/Source/modules/webaudio/DefaultAudioDestinationNode.h
index 50e55b6601619d46634ea5399a712592650ac822..9b6a8d29591d92ba1a25ea82b308fe4c16746d6b 100644
--- a/Source/modules/webaudio/DefaultAudioDestinationNode.h
+++ b/Source/modules/webaudio/DefaultAudioDestinationNode.h
@@ -31,7 +31,7 @@
 
 namespace blink {
 
-class AudioContext;
+class AbstractAudioContext;
 class ExceptionState;
 
 class DefaultAudioDestinationHandler final : public AudioDestinationHandler {
@@ -61,10 +61,10 @@ private:
 
 class DefaultAudioDestinationNode final : public AudioDestinationNode {
 public:
-    static DefaultAudioDestinationNode* create(AudioContext*);
+    static DefaultAudioDestinationNode* create(AbstractAudioContext*);
 
 private:
-    explicit DefaultAudioDestinationNode(AudioContext&);
+    explicit DefaultAudioDestinationNode(AbstractAudioContext&);
 };
 
 } // namespace blink