Split "Online" and "Offline" AudioContext processing

Source/modules/webaudio/AudioBasicInspectorNode.h

Index: Source/modules/webaudio/AudioBasicInspectorNode.h
diff --git a/Source/modules/webaudio/AudioBasicInspectorNode.h b/Source/modules/webaudio/AudioBasicInspectorNode.h
index bf738bd8a56da8b07f034be1d5b00f5fbdbbec37..6d882e495f3cbb59baa216e742f6ede0006bfc11 100644
--- a/Source/modules/webaudio/AudioBasicInspectorNode.h
+++ b/Source/modules/webaudio/AudioBasicInspectorNode.h
@@ -29,11 +29,12 @@
 
 namespace blink {
 
+class AbstractAudioContext;
 class ExceptionState;
 
 // AudioBasicInspectorNode is an AudioNode with one input and one output where the output might not necessarily connect to another node's input.
 // If the output is not connected to any other node, then the AudioBasicInspectorNode's processIfNecessary() function will be called automatically by
-// AudioContext before the end of each render quantum so that it can inspect the audio stream.
+// AbstractAudioContext before the end of each render quantum so that it can inspect the audio stream.
 class AudioBasicInspectorHandler : public AudioHandler {
 public:
     AudioBasicInspectorHandler(NodeType, AudioNode&, float sampleRate, unsigned outputChannelCount);
@@ -45,12 +46,12 @@ public:
     void updatePullStatus();
 
 private:
-    bool m_needAutomaticPull; // When setting to true, AudioBasicInspectorHandler will be pulled automaticlly by AudioContext before the end of each render quantum.
+    bool m_needAutomaticPull; // When setting to true, AudioBasicInspectorHandler will be pulled automaticlly by AbstractAudioContext before the end of each render quantum.
 };
 
 class AudioBasicInspectorNode : public AudioNode {
 protected:
-    explicit AudioBasicInspectorNode(AudioContext& context) : AudioNode(context) { }
+    explicit AudioBasicInspectorNode(AbstractAudioContext& context) : AudioNode(context) { }
 
 private:
     // TODO(tkent): Should AudioBasicInspectorNode override other variants of