Delete WorldContextHandle in favor of DOMWrapperWorld

Source/bindings/v8/V8WorkerContextEventListener.cpp

Index: Source/bindings/v8/V8WorkerContextEventListener.cpp
diff --git a/Source/bindings/v8/V8WorkerContextEventListener.cpp b/Source/bindings/v8/V8WorkerContextEventListener.cpp
index 167e0fa1fcf4a4e4430762266ea0ea1b9a0fa2ac..5c6b00b6a26b08ee7df563f101796bd44a6513af 100644
--- a/Source/bindings/v8/V8WorkerContextEventListener.cpp
+++ b/Source/bindings/v8/V8WorkerContextEventListener.cpp
@@ -116,7 +116,7 @@ v8::Local<v8::Object> V8WorkerContextEventListener::getReceiverObject(ScriptExec
         return listener;
 
     EventTarget* target = event->currentTarget();
-    v8::Handle<v8::Value> value = toV8(target, v8::Handle<v8::Object>(), toV8Context(context, worldContext())->GetIsolate());
+    v8::Handle<v8::Value> value = toV8(target, v8::Handle<v8::Object>(), toV8Context(context, world())->GetIsolate());
     if (value.IsEmpty())
         return v8::Local<v8::Object>();
     return v8::Local<v8::Object>::New(v8::Handle<v8::Object>::Cast(value));