Fixing crash with sig: blink::FrameConsole::addMessage

Source/core/frame/FrameConsole.h

 /*
  * Copyright (C) 2013 Apple 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 47 matching lines @@
     void addMessage(PassRefPtrWillBeRawPtr<ConsoleMessage>);
     void adoptWorkerMessagesAfterTermination(WorkerGlobalScopeProxy*);
 
     void reportResourceResponseReceived(DocumentLoader*, unsigned long requestIdentifier, const ResourceResponse&);
 
     static String formatStackTraceString(const String& originalMessage, PassRefPtrWillBeRawPtr<ScriptCallStack>);
 
     static void mute();
     static void unmute();
 
-    ConsoleMessageStorage* messageStorage();
     void clearMessages();
 
     void didFailLoading(unsigned long requestIdentifier, const ResourceError&);
 
     void trace(Visitor*);
 
 private:
     explicit FrameConsole(LocalFrame&);
 
     LocalFrame& frame() const
     {
         ASSERT(m_frame);
         return *m_frame;
     }
 
+    ConsoleMessageStorage* messageStorage();
+
     RawPtrWillBeMember<LocalFrame> m_frame;
-    OwnPtrWillBeMember<ConsoleMessageStorage> m_consoleMessageStorage;
 };
 
 } // namespace blink
 
 #endif // FrameConsole_h