Oilpan: fix build after r195535.

Source/modules/serviceworkers/StashedMessagePort.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "modules/serviceworkers/StashedMessagePort.h"
 
 #include "bindings/core/v8/SerializedScriptValue.h"
 #include "core/dom/CrossThreadTask.h"
 #include "core/events/MessageEvent.h"
@@ skipping 40 matching lines @@
 {
     ASSERT(executionContext());
     executionContext()->postTask(FROM_HERE, createCrossThreadTask(&StashedMessagePort::dispatchMessages, m_weakFactory.createWeakPtr()));
 }
 
 void StashedMessagePort::dispatchMessages()
 {
     if (!isEntangled())
         return;
     ASSERT(executionContext()->isServiceWorkerGlobalScope());
-    RefPtr<StashedPortCollection> stashedPorts = toServiceWorkerGlobalScope(executionContext())->ports();
+    RefPtrWillBeRawPtr<StashedPortCollection> stashedPorts = toServiceWorkerGlobalScope(executionContext())->ports();
 
     RefPtr<SerializedScriptValue> message;
     OwnPtr<MessagePortChannelArray> channels;
     while (tryGetMessage(message, channels)) {
         OwnPtrWillBeRawPtr<MessagePortArray> ports = MessagePort::entanglePorts(*executionContext(), channels.release());
         RefPtrWillBeRawPtr<Event> evt = MessageEvent::create(ports.release(), message.release(), String(), String(), this);
 
         stashedPorts->dispatchEvent(evt.release(), ASSERT_NO_EXCEPTION);
     }
 }
 
 } // namespace blink