WebAudio: Split AudioNode::finishDeref into two parts.

Source/modules/webaudio/AudioNode.h

Index: Source/modules/webaudio/AudioNode.h
diff --git a/Source/modules/webaudio/AudioNode.h b/Source/modules/webaudio/AudioNode.h
index d49f8faa45d4e3f15a7f429e300b847c61bfa70f..0ae7839e801d2fad18a734bbba9119efd855baaa 100644
--- a/Source/modules/webaudio/AudioNode.h
+++ b/Source/modules/webaudio/AudioNode.h
@@ -108,6 +108,7 @@ public:
 
     // Can be called from main thread or context's audio thread.  It must be called while the context's graph lock is held.
     void finishDeref();
+    void breakConnectionWithLock();
 
     // The AudioNodeInput(s) (if any) will already have their input data available when process() is called.
     // Subclasses will take this input data and put the results in the AudioBus(s) of its AudioNodeOutput(s) (if any).
@@ -229,7 +230,6 @@ private:
     // Ref-counting
     volatile int m_normalRefCount;
     volatile int m_connectionRefCount;
-    bool m_wasDisconnected;
 
     bool m_isMarkedForDeletion;
     bool m_isDisabled;