Remove unnecessary members for tricky lazy initialization in AudioContext.

Source/modules/webaudio/AudioNode.cpp

Index: Source/modules/webaudio/AudioNode.cpp
diff --git a/Source/modules/webaudio/AudioNode.cpp b/Source/modules/webaudio/AudioNode.cpp
index da33be4a49aefda4493ae7dec0b3f53f1da95a8c..e48936c7335a4167deb56800f34ce1f03f7917b7 100644
--- a/Source/modules/webaudio/AudioNode.cpp
+++ b/Source/modules/webaudio/AudioNode.cpp
@@ -527,7 +527,7 @@ void AudioNode::deref(RefType refType)
     // Once AudioContext::uninitialize() is called there's no more chances for deleteMarkedNodes() to get called, so we call here.
     // We can't call in AudioContext::~AudioContext() since it will never be called as long as any AudioNode is alive
     // because AudioNodes keep a reference to the context.
-    if (context()->isAudioThreadFinished())
+    if (!context()->isInitialized())
         context()->deleteMarkedNodes();
 }