Pass RenderStyle / RenderObject by reference in more places

Source/core/frame/animation/KeyframeAnimation.h

 /*
  * 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
@@ skipping 23 matching lines @@
 #include "core/rendering/style/KeyframeList.h"
 
 namespace WebCore {
 
 class RenderStyle;
 
 // A KeyframeAnimation tracks the state of an explicit animation
 // for a single RenderObject.
 class KeyframeAnimation : public AnimationBase {
 public:
-    static PassRefPtr<KeyframeAnimation> create(const CSSAnimationData* animation, RenderObject* renderer, int index, CompositeAnimation* compositeAnimation, RenderStyle* unanimatedStyle)
+    static PassRefPtr<KeyframeAnimation> create(const CSSAnimationData* animation, RenderObject& renderer, int index, CompositeAnimation* compositeAnimation, RenderStyle& unanimatedStyle)
     {
         return adoptRef(new KeyframeAnimation(animation, renderer, index, compositeAnimation, unanimatedStyle));
     };
 
     virtual void animate(CompositeAnimation*, RenderObject*, const RenderStyle* currentStyle, RenderStyle* targetStyle, RefPtr<RenderStyle>& animatedStyle);
     virtual void getAnimatedStyle(RefPtr<RenderStyle>& animatedStyle);
 
     const AtomicString& name() const { return m_keyframes.animationName(); }
     int index() const { return m_index; }
     void setIndex(int i) { m_index = i; }
@@ skipping 18 matching lines @@
 
     bool shouldSendEventForListener(Document::ListenerType inListenerType) const;
     bool sendAnimationEvent(const AtomicString&, double elapsedTime);
 
     virtual bool affectsProperty(CSSPropertyID) const;
 
     void validateTransformFunctionList();
     void checkForMatchingFilterFunctionLists();
 
 private:
-    KeyframeAnimation(const CSSAnimationData* animation, RenderObject*, int index, CompositeAnimation*, RenderStyle* unanimatedStyle);
+    KeyframeAnimation(const CSSAnimationData*, RenderObject&, int index, CompositeAnimation*, RenderStyle& unanimatedStyle);
     virtual ~KeyframeAnimation();
 
     // Get the styles for the given property surrounding the current animation time and the progress between them.
     void fetchIntervalEndpointsForProperty(CSSPropertyID, const RenderStyle*& fromStyle, const RenderStyle*& toStyle, double& progress) const;
 
     // The keyframes that we are blending.
     KeyframeList m_keyframes;
 
     // The order in which this animation appears in the animation-name style.
     int m_index;
     bool m_startEventDispatched;
 
     // The style just before we started animation
     RefPtr<RenderStyle> m_unanimatedStyle;
 };
 
 } // namespace WebCore
 
 #endif // KeyframeAnimation_h