DevTools: InspectorHistory actions become refcounted.

Source/core/inspector/InspectorHistory.h

 /*
  * Copyright (C) 2012 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef InspectorHistory_h
 #define InspectorHistory_h
 
-#include "wtf/OwnPtr.h"
+#include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class ExceptionState;
 
 class InspectorHistory FINAL {
     WTF_MAKE_NONCOPYABLE(InspectorHistory); WTF_MAKE_FAST_ALLOCATED;
 public:
-    class Action {
+    class Action : public RefCounted<Action> {
         WTF_MAKE_FAST_ALLOCATED;
     public:
         Action(const String& name);
         virtual ~Action();
         virtual String toString();
 
         virtual String mergeId();
-        virtual void merge(PassOwnPtr<Action>);
+        virtual void merge(PassRefPtr<Action>);
 
         virtual bool perform(ExceptionState&) = 0;
 
         virtual bool undo(ExceptionState&) = 0;
         virtual bool redo(ExceptionState&) = 0;
 
         virtual bool isUndoableStateMark();
     private:
         String m_name;
     };
 
     InspectorHistory();
 
-    bool perform(PassOwnPtr<Action>, ExceptionState&);
+    bool perform(PassRefPtr<Action>, ExceptionState&);
     void markUndoableState();
 
     bool undo(ExceptionState&);
     bool redo(ExceptionState&);
     void reset();
 
 private:
-    Vector<OwnPtr<Action> > m_history;
+    Vector<RefPtr<Action> > m_history;
     size_t m_afterLastActionIndex;
 };
 
 
 } // namespace WebCore
 
 #endif // !defined(InspectorHistory_h)