Oilpan: Move ConsoleMessage to the heap.

Source/core/workers/WorkerGlobalScope.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2009, 2011 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 287 matching lines @@
         postTask(AddConsoleMessageTask::create(source, level, message));
         return;
     }
     thread()->workerReportingProxy().reportConsoleMessage(source, level, message, lineNumber, sourceURL);
     addMessageToWorkerConsole(source, level, message, sourceURL, lineNumber, nullptr, scriptState);
 }
 
 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());
 }
 
 bool WorkerGlobalScope::isContextThread() const
 {
     return thread()->isCurrentThread();
 }
 
@@ skipping 29 matching lines @@
     visitor->trace(m_navigator);
     visitor->trace(m_workerInspectorController);
     visitor->trace(m_eventQueue);
     visitor->trace(m_workerClients);
     WillBeHeapSupplementable<WorkerGlobalScope>::trace(visitor);
     ExecutionContext::trace(visitor);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink