Clean up WebDOMEvent ownership of WebCore::Event.

Source/WebKit/chromium/public/WebDOMEvent.h

 /*
  * Copyright (C) 2010 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 14 matching lines @@
  * 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 WebDOMEvent_h
 #define WebDOMEvent_h
 
 #include "../../../../public/platform/WebCommon.h"
+#include "../../../../public/platform/WebPrivatePtr.h"
 #include "../../../../public/platform/WebString.h"
 #include "WebNode.h"
 
 namespace WebCore { class Event; }
 #if WEBKIT_IMPLEMENTATION
 namespace WTF { template <typename T> class PassRefPtr; }
 #endif
 
 namespace WebKit {
 
 class WebDOMEvent {
 public:
     enum PhaseType {
         CapturingPhase     = 1,
         AtTarget           = 2,
         BubblingPhase      = 3
     };
 
     ~WebDOMEvent() { reset(); }
 
-    WebDOMEvent() : m_private(0) { }
-    WebDOMEvent(const WebDOMEvent& e) : m_private(0) { assign(e); }
+    WebDOMEvent() { }
+    WebDOMEvent(const WebDOMEvent& e) : m_private(e.m_private) { }
     WebDOMEvent& operator=(const WebDOMEvent& e)
     {
         assign(e);
         return *this;
     }
 
     WEBKIT_EXPORT void reset();
     WEBKIT_EXPORT void assign(const WebDOMEvent&);
 
-    bool isNull() const { return !m_private; }
+    bool isNull() const { return m_private.isNull(); }
 
     WEBKIT_EXPORT WebString type() const;
     WEBKIT_EXPORT WebNode target() const;
     WEBKIT_EXPORT WebNode currentTarget() const;
 
     WEBKIT_EXPORT PhaseType eventPhase() const;
     WEBKIT_EXPORT bool bubbles() const;
     WEBKIT_EXPORT bool cancelable() const;
 
     WEBKIT_EXPORT bool isUIEvent() const;
@@ skipping 28 matching lines @@
 
     template<typename T> const T toConst() const
     {
         T res;
         res.WebDOMEvent::assign(*this);
         return res;
     }
 
 protected:
     typedef WebCore::Event WebDOMEventPrivate;
-    void assign(WebDOMEventPrivate*);
-    WebDOMEventPrivate* m_private;
+#if WEBKIT_IMPLEMENTATION
+    void assign(const WTF::PassRefPtr<WebDOMEventPrivate>&);
 
     template<typename T> T* unwrap()
     {
-        return static_cast<T*>(m_private);
+        return static_cast<T*>(m_private.get());
     }
 
     template<typename T> const T* constUnwrap() const
     {
-        return static_cast<const T*>(m_private);
+        return static_cast<const T*>(m_private.get());
     }
+#endif
+
+    WebPrivatePtr<WebDOMEventPrivate> m_private;
 };
 
 } // namespace WebKit
 
 #endif