Split "Online" and "Offline" AudioContext processing

Source/modules/webaudio/AnalyserNode.h

Index: Source/modules/webaudio/AnalyserNode.h
diff --git a/Source/modules/webaudio/AnalyserNode.h b/Source/modules/webaudio/AnalyserNode.h
index 1dbcb33bc54a5f975a5c44a70c6ece42c9e355b4..f7cbea4e9d4f15575a72477c8d041612a8c35f10 100644
--- a/Source/modules/webaudio/AnalyserNode.h
+++ b/Source/modules/webaudio/AnalyserNode.h
@@ -31,6 +31,7 @@
 
 namespace blink {
 
+class AbstractAudioContext;
 class ExceptionState;
 
 class AnalyserHandler final : public AudioBasicInspectorHandler {
@@ -69,7 +70,7 @@ private:
 class AnalyserNode final : public AudioBasicInspectorNode {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static AnalyserNode* create(AudioContext&, float sampleRate);
+    static AnalyserNode* create(AbstractAudioContext&, float sampleRate);
 
     unsigned fftSize() const;
     void setFftSize(unsigned size, ExceptionState&);
@@ -86,7 +87,7 @@ public:
     void getByteTimeDomainData(DOMUint8Array*);
 
 private:
-    AnalyserNode(AudioContext&, float sampleRate);
+    AnalyserNode(AbstractAudioContext&, float sampleRate);
     AnalyserHandler& analyserHandler() const;
 };