Oilpan: Replace most of RefPtrs for Event objects with oilpan's transition types

Source/core/workers/SharedWorkerGlobalScope.cpp

Index: Source/core/workers/SharedWorkerGlobalScope.cpp
diff --git a/Source/core/workers/SharedWorkerGlobalScope.cpp b/Source/core/workers/SharedWorkerGlobalScope.cpp
index b45fe494bfc6682b68eb31d61ee10f4bbca95465..0332b1a4034b6b743e8c5c3c6c3227e66d522423 100644
--- a/Source/core/workers/SharedWorkerGlobalScope.cpp
+++ b/Source/core/workers/SharedWorkerGlobalScope.cpp
@@ -41,10 +41,10 @@
 
 namespace WebCore {
 
-PassRefPtr<MessageEvent> createConnectEvent(PassRefPtr<MessagePort> prpPort)
+PassRefPtrWillBeRawPtr<MessageEvent> createConnectEvent(PassRefPtr<MessagePort> prpPort)
 {
     RefPtr<MessagePort> port = prpPort;
-    RefPtr<MessageEvent> event = MessageEvent::create(adoptPtr(new MessagePortArray(1, port)), String(), String(), port);
+    RefPtrWillBeRawPtr<MessageEvent> event = MessageEvent::create(adoptPtr(new MessagePortArray(1, port)), String(), String(), port);
     event->initEvent(EventTypeNames::connect, false, false);
     return event.release();
 }