Tried using CrossThreadPersistent for workerDebuggerAgents

Source/bindings/v8/custom/V8InjectedScriptManager.cpp

Index: Source/bindings/v8/custom/V8InjectedScriptManager.cpp
diff --git a/Source/bindings/v8/custom/V8InjectedScriptManager.cpp b/Source/bindings/v8/custom/V8InjectedScriptManager.cpp
index 9f8bc2138c7b60f7c7fefb6990b4990838ad8015..feb05382d0e147127a47d879be3b5e43d45647eb 100644
--- a/Source/bindings/v8/custom/V8InjectedScriptManager.cpp
+++ b/Source/bindings/v8/custom/V8InjectedScriptManager.cpp
@@ -48,7 +48,7 @@ namespace WebCore {
 
 struct InjectedScriptManager::CallbackData {
     ScopedPersistent<v8::Object> handle;
-    RefPtr<InjectedScriptHost> host;
+    RefPtrWillBePersistent<InjectedScriptHost> host;
 };
 
 static v8::Local<v8::Object> createInjectedScriptHostV8Wrapper(InjectedScriptHost* host, v8::Isolate* isolate)
@@ -63,7 +63,7 @@ static v8::Local<v8::Object> createInjectedScriptHostV8Wrapper(InjectedScriptHos
         // Avoid setting the wrapper if allocation failed.
         return v8::Local<v8::Object>();
     }
-    V8DOMWrapper::setNativeInfo(instanceTemplate, &V8InjectedScriptHost::wrapperTypeInfo, host);
+    V8DOMWrapper::setNativeInfoForHiddenWrapper(instanceTemplate, &V8InjectedScriptHost::wrapperTypeInfo, host);
     // Create a weak reference to the v8 wrapper of InspectorBackend to deref
     // InspectorBackend when the wrapper is garbage collected.
     InjectedScriptManager::CallbackData* data = new InjectedScriptManager::CallbackData;