Oilpan: Reduce RefPtr to WorkerGlobalScope.

Source/web/WebSharedWorkerImpl.cpp

Index: Source/web/WebSharedWorkerImpl.cpp
diff --git a/Source/web/WebSharedWorkerImpl.cpp b/Source/web/WebSharedWorkerImpl.cpp
index bbd78a1a2ae54a6d24112033c8dc4a285313026c..2d4a0ef08b396d868e2e0bf722e9535f81311bf3 100644
--- a/Source/web/WebSharedWorkerImpl.cpp
+++ b/Source/web/WebSharedWorkerImpl.cpp
@@ -311,11 +311,11 @@ void WebSharedWorkerImpl::connect(WebMessagePortChannel* webChannel)
 void WebSharedWorkerImpl::connectTask(ExecutionContext* context, PassOwnPtr<WebMessagePortChannel> channel)
 {
     // Wrap the passed-in channel in a MessagePort, and send it off via a connect event.
-    RefPtr<MessagePort> port = MessagePort::create(*context);
+    RefPtrWillBeRawPtr<MessagePort> port = MessagePort::create(*context);
     port->entangle(channel);
     WorkerGlobalScope* workerGlobalScope = toWorkerGlobalScope(context);
     ASSERT_WITH_SECURITY_IMPLICATION(workerGlobalScope->isSharedWorkerGlobalScope());
-    workerGlobalScope->dispatchEvent(createConnectEvent(port));
+    workerGlobalScope->dispatchEvent(createConnectEvent(port.release()));
 }
 
 void WebSharedWorkerImpl::startWorkerContext(const WebURL& url, const WebString& name, const WebString& contentSecurityPolicy, WebContentSecurityPolicyType policyType)