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diff --git a/WebCore/page/animation/ImplicitAnimation.h b/WebCore/page/animation/ImplicitAnimation.h
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+/*
+ * Copyright (C) 2007 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
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT 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 ImplicitAnimation_h
+#define ImplicitAnimation_h
+
+#include "AnimationBase.h"
+#include "Document.h"
+
+namespace WebCore {
+
+// An ImplicitAnimation tracks the state of a transition of a specific CSS property
+// for a single RenderObject.
+class ImplicitAnimation : public AnimationBase {
+public:
+    static PassRefPtr<ImplicitAnimation> create(const Animation* animation, int animatingProperty, RenderObject* renderer, CompositeAnimation* compositeAnimation, RenderStyle* fromStyle)
+    {
+        return adoptRef(new ImplicitAnimation(animation, animatingProperty, renderer, compositeAnimation, fromStyle));
+    };
+    
+    int transitionProperty() const { return m_transitionProperty; }
+    int animatingProperty() const { return m_animatingProperty; }
+
+    virtual void onAnimationEnd(double elapsedTime);
+
+    virtual void animate(CompositeAnimation*, RenderObject*, RenderStyle* currentStyle, RenderStyle* targetStyle, RefPtr<RenderStyle>& animatedStyle);
+    virtual void reset(RenderStyle* to);
+
+    void setOverridden(bool);
+    virtual bool overridden() const { return m_overridden; }
+
+    virtual bool shouldFireEvents() const { return true; }
+
+    virtual bool affectsProperty(int) const;
+
+    bool hasStyle() const { return m_fromStyle && m_toStyle; }
+
+    bool isTargetPropertyEqual(int, const RenderStyle* targetStyle);
+
+    void blendPropertyValueInStyle(int, RenderStyle* currentStyle);
+
+protected:
+    bool shouldSendEventForListener(Document::ListenerType);    
+    bool sendTransitionEvent(const AtomicString&, double elapsedTime);
+
+    void validateTransformFunctionList();
+
+private:
+    ImplicitAnimation(const Animation*, int animatingProperty, RenderObject*, CompositeAnimation*, RenderStyle* fromStyle);    
+    virtual ~ImplicitAnimation();
+
+    int m_transitionProperty;   // Transition property as specified in the RenderStyle. May be cAnimateAll
+    int m_animatingProperty;    // Specific property for this ImplicitAnimation
+    bool m_overridden;          // true when there is a keyframe animation that overrides the transitioning property
+
+    // The two styles that we are blending.
+    RefPtr<RenderStyle> m_fromStyle;
+    RefPtr<RenderStyle> m_toStyle;
+};
+
+} // namespace WebCore
+
+#endif // ImplicitAnimation_h