Split "Online" and "Offline" AudioContext processing

Source/modules/webaudio/ScriptProcessorNode.h

Index: Source/modules/webaudio/ScriptProcessorNode.h
diff --git a/Source/modules/webaudio/ScriptProcessorNode.h b/Source/modules/webaudio/ScriptProcessorNode.h
index 064b6d2dbc13a971d661cd7af6bc2ddeb5344d12..8c9d4b19661f807ce067965e4d138c67e564d499 100644
--- a/Source/modules/webaudio/ScriptProcessorNode.h
+++ b/Source/modules/webaudio/ScriptProcessorNode.h
@@ -34,8 +34,8 @@
 
 namespace blink {
 
+class AbstractAudioContext;
 class AudioBuffer;
-class AudioContext;
 
 // ScriptProcessorNode is an AudioNode which allows for arbitrary synthesis or processing directly using JavaScript.
 // The API allows for a variable number of inputs and outputs, although it must have at least one input or output.
@@ -101,13 +101,13 @@ public:
     // latency. Higher numbers will be necessary to avoid audio breakup and
     // glitches.
     // The value chosen must carefully balance between latency and audio quality.
-    static ScriptProcessorNode* create(AudioContext&, float sampleRate, size_t bufferSize, unsigned numberOfInputChannels, unsigned numberOfOutputChannels);
+    static ScriptProcessorNode* create(AbstractAudioContext&, float sampleRate, size_t bufferSize, unsigned numberOfInputChannels, unsigned numberOfOutputChannels);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(audioprocess);
     size_t bufferSize() const;
 
 private:
-    ScriptProcessorNode(AudioContext&, float sampleRate, size_t bufferSize, unsigned numberOfInputChannels, unsigned numberOfOutputChannels);
+    ScriptProcessorNode(AbstractAudioContext&, float sampleRate, size_t bufferSize, unsigned numberOfInputChannels, unsigned numberOfOutputChannels);
 };
 
 } // namespace blink