[DevTools] Remove ScriptDebugListener from V8Debugger.

Source/core/inspector/WorkerThreadDebugger.cpp

Index: Source/core/inspector/WorkerThreadDebugger.cpp
diff --git a/Source/core/inspector/WorkerThreadDebugger.cpp b/Source/core/inspector/WorkerThreadDebugger.cpp
index 4d38fa05e5055d25b5398be1135f4a77158829a2..cb463743d6ca28c92f2601bb83743f5357cfafd5 100644
--- a/Source/core/inspector/WorkerThreadDebugger.cpp
+++ b/Source/core/inspector/WorkerThreadDebugger.cpp
@@ -44,7 +44,7 @@ namespace blink {
 static const char* workerContextDebugId = "[worker]";
 
 WorkerThreadDebugger::WorkerThreadDebugger(WorkerGlobalScope* workerGlobalScope)
-    : ScriptDebuggerBase(v8::Isolate::GetCurrent(), V8Debugger::create(v8::Isolate::GetCurrent(), this))
+    : ScriptDebuggerBase(v8::Isolate::GetCurrent())
     , m_listener(nullptr)
     , m_workerGlobalScope(workerGlobalScope)
 {