Pass RenderStyle / RenderObject by reference in more places

Source/core/frame/animation/KeyframeAnimation.cpp

 /*
  * Copyright (C) 2007, 2012 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 26 matching lines @@
 #include "core/frame/animation/CSSPropertyAnimation.h"
 #include "core/frame/animation/CompositeAnimation.h"
 #include "core/rendering/RenderBoxModelObject.h"
 #include "core/rendering/style/RenderStyle.h"
 #include "public/platform/Platform.h"
 
 using namespace std;
 
 namespace WebCore {
 
-KeyframeAnimation::KeyframeAnimation(const CSSAnimationData* animation, RenderObject* renderer, int index, CompositeAnimation* compAnim, RenderStyle* unanimatedStyle)
+KeyframeAnimation::KeyframeAnimation(const CSSAnimationData* animation, RenderObject& renderer, int index, CompositeAnimation* compAnim, RenderStyle& unanimatedStyle)
     : AnimationBase(animation, renderer, compAnim)
     , m_keyframes(renderer, animation->name())
     , m_index(index)
     , m_startEventDispatched(false)
     , m_unanimatedStyle(unanimatedStyle)
 {
     // Get the keyframe RenderStyles
     if (m_object && m_object->node() && m_object->node()->isElementNode())
         m_object->document().styleResolver()->keyframeStylesForAnimation(toElement(m_object->node()), unanimatedStyle, m_keyframes);
 
@@ skipping 390 matching lines @@
 
     if (acceleratedPropertiesOnly) {
         bool isLooping;
         getTimeToNextEvent(t, isLooping);
     }
 
     return t;
 }
 
 } // namespace WebCore