Make DOMWrapperWorld::current() return a reference instead of a pointer

Source/bindings/v8/V8Initializer.cpp

Index: Source/bindings/v8/V8Initializer.cpp
diff --git a/Source/bindings/v8/V8Initializer.cpp b/Source/bindings/v8/V8Initializer.cpp
index 98dce3b8fc1fd36669dcce3b4cae9029b16d528b..1cd02627b1ad467f5ba56a3ce2f0429a1a2ec8c3 100644
--- a/Source/bindings/v8/V8Initializer.cpp
+++ b/Source/bindings/v8/V8Initializer.cpp
@@ -111,8 +111,8 @@ static void messageHandlerInMainThread(v8::Handle<v8::Message> message, v8::Hand
     String resource = shouldUseDocumentURL ? enteredWindow->document()->url() : toCoreString(resourceName.As<v8::String>());
     AccessControlStatus corsStatus = message->IsSharedCrossOrigin() ? SharableCrossOrigin : NotSharableCrossOrigin;
 
-    DOMWrapperWorld* world = DOMWrapperWorld::current(isolate);
-    RefPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, resource, message->GetLineNumber(), message->GetStartColumn() + 1, world);
+    DOMWrapperWorld& world = DOMWrapperWorld::current(isolate);
+    RefPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, resource, message->GetLineNumber(), message->GetStartColumn() + 1, &world);
     if (V8DOMWrapper::isDOMWrapper(data)) {
         v8::Handle<v8::Object> obj = v8::Handle<v8::Object>::Cast(data);
         const WrapperTypeInfo* type = toWrapperTypeInfo(obj);
@@ -127,7 +127,7 @@ static void messageHandlerInMainThread(v8::Handle<v8::Message> message, v8::Hand
     // avoid storing the exception object, as we can't create a wrapper during context creation.
     // FIXME: Can we even get here during initialization now that we bail out when GetEntered returns an empty handle?
     LocalFrame* frame = enteredWindow->document()->frame();
-    if (world && frame && frame->script().existingWindowShell(world))
+    if (frame && frame->script().existingWindowShell(world))
         V8ErrorHandler::storeExceptionOnErrorEventWrapper(event.get(), data, v8::Isolate::GetCurrent());
     enteredWindow->document()->reportException(event.release(), callStack, corsStatus);
 }
@@ -219,7 +219,7 @@ static void messageHandlerInWorker(v8::Handle<v8::Message> message, v8::Handle<v
         String errorMessage = toCoreString(message->Get());
         V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, sourceURL, message->GetScriptResourceName());
 
-        RefPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, sourceURL, message->GetLineNumber(), message->GetStartColumn() + 1, DOMWrapperWorld::current(isolate));
+        RefPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, sourceURL, message->GetLineNumber(), message->GetStartColumn() + 1, &DOMWrapperWorld::current(isolate));
         AccessControlStatus corsStatus = message->IsSharedCrossOrigin() ? SharableCrossOrigin : NotSharableCrossOrigin;
 
         V8ErrorHandler::storeExceptionOnErrorEventWrapper(event.get(), data, isolate);