Oilpan: Move ConsoleMessage to the heap.

Source/core/workers/WorkerGlobalScope.cpp

Index: Source/core/workers/WorkerGlobalScope.cpp
diff --git a/Source/core/workers/WorkerGlobalScope.cpp b/Source/core/workers/WorkerGlobalScope.cpp
index 179ede0178d3212d3164f9fc6140a1232a24636d..7730f536ba3e91172734a8f9969b4fd27244b805 100644
--- a/Source/core/workers/WorkerGlobalScope.cpp
+++ b/Source/core/workers/WorkerGlobalScope.cpp
@@ -305,7 +305,7 @@ void WorkerGlobalScope::addMessage(MessageSource source, MessageLevel level, con
 void WorkerGlobalScope::addMessageToWorkerConsole(MessageSource source, MessageLevel level, const String& message, const String& sourceURL, unsigned lineNumber, PassRefPtrWillBeRawPtr<ScriptCallStack> callStack, ScriptState* scriptState)
 {
     ASSERT(isContextThread());
-    RefPtr<ConsoleMessage> consoleMessage = ConsoleMessage::create(source, level, message, sourceURL, lineNumber);
+    RefPtrWillBeRawPtr<ConsoleMessage> consoleMessage = ConsoleMessage::create(source, level, message, sourceURL, lineNumber);
     consoleMessage->setCallStack(callStack);
     consoleMessage->setScriptState(scriptState);
     InspectorInstrumentation::addMessageToConsole(this, consoleMessage.get());