Oilpan: fix build after r179934.

Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp

Index: Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
diff --git a/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp b/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
index 75c0f636b615627bdf953f72d1c7e95b3b7eb53c..e710853bf50585f9894010421938825532d0f8c7 100644
--- a/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
+++ b/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
@@ -191,7 +191,7 @@ void ServiceWorkerGlobalScope::importScripts(const Vector<String>& urls, Excepti
 void ServiceWorkerGlobalScope::logExceptionToConsole(const String& errorMessage, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtrWillBeRawPtr<ScriptCallStack> callStack)
 {
     WorkerGlobalScope::logExceptionToConsole(errorMessage, sourceURL, lineNumber, columnNumber, callStack);
-    RefPtr<ConsoleMessage> consoleMessage = ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, errorMessage, sourceURL, lineNumber);
+    RefPtrWillBeRawPtr<ConsoleMessage> consoleMessage = ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, errorMessage, sourceURL, lineNumber);
     consoleMessage->setCallStack(callStack);
     addMessageToWorkerConsole(consoleMessage.release());
 }