Make RenderObject::style() return a const object

Source/core/animation/css/CSSAnimations.cpp

 /*
  * Copyright (C) 2013 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 68 matching lines @@
     case CSSPropertyWebkitTransformOriginY:
     case CSSPropertyWebkitTransformOriginZ:
     case CSSPropertyWebkitTransformOrigin:
         return CSSPropertyTransformOrigin;
     default:
         break;
     }
     return property;
 }
 
-static PassRefPtrWillBeRawPtr<AnimatableValueKeyframeEffectModel> createKeyframeEffect(StyleResolver* resolver, const Element* animatingElement, Element& element, const LayoutStyle& style, LayoutStyle* parentStyle,
+static PassRefPtrWillBeRawPtr<AnimatableValueKeyframeEffectModel> createKeyframeEffect(StyleResolver* resolver, const Element* animatingElement, Element& element, const LayoutStyle& style, const LayoutStyle* parentStyle,
     const AtomicString& name, TimingFunction* defaultTimingFunction)
 {
     // When the animating element is null, use its parent for scoping purposes.
     const Element* elementForScoping = animatingElement ? animatingElement : &element;
     const StyleRuleKeyframes* keyframesRule = resolver->findKeyframesRule(elementForScoping, name);
     ASSERT(keyframesRule);
 
     AnimatableValueKeyframeVector keyframes;
     const WillBeHeapVector<RefPtrWillBeMember<StyleRuleKeyframe>>& styleKeyframes = keyframesRule->keyframes();
 
@@ skipping 120 matching lines @@
 
 bool CSSAnimations::isTransitionAnimationForInspector(const AnimationPlayer& player) const
 {
     for (const auto& it : m_transitions) {
         if (it.value.player->sequenceNumber() == player.sequenceNumber())
             return true;
     }
     return false;
 }
 
-PassOwnPtrWillBeRawPtr<CSSAnimationUpdate> CSSAnimations::calculateUpdate(const Element* animatingElement, Element& element, const LayoutStyle& style, LayoutStyle* parentStyle, StyleResolver* resolver)
+PassOwnPtrWillBeRawPtr<CSSAnimationUpdate> CSSAnimations::calculateUpdate(const Element* animatingElement, Element& element, const LayoutStyle& style, const LayoutStyle* parentStyle, StyleResolver* resolver)
 {
     OwnPtrWillBeRawPtr<CSSAnimationUpdate> update = adoptPtrWillBeNoop(new CSSAnimationUpdate());
     calculateAnimationUpdate(update.get(), animatingElement, element, style, parentStyle, resolver);
     calculateAnimationActiveInterpolations(update.get(), animatingElement, element.document().timeline().currentTimeInternal());
     calculateTransitionUpdate(update.get(), animatingElement, style);
     calculateTransitionActiveInterpolations(update.get(), animatingElement, element.document().timeline().currentTimeInternal());
     return update->isEmpty() ? nullptr : update.release();
 }
 
-void CSSAnimations::calculateAnimationUpdate(CSSAnimationUpdate* update, const Element* animatingElement, Element& element, const LayoutStyle& style, LayoutStyle* parentStyle, StyleResolver* resolver)
+void CSSAnimations::calculateAnimationUpdate(CSSAnimationUpdate* update, const Element* animatingElement, Element& element, const LayoutStyle& style, const LayoutStyle* parentStyle, StyleResolver* resolver)
 {
     const ActiveAnimations* activeAnimations = animatingElement ? animatingElement->activeAnimations() : nullptr;
 
     bool isAnimationStyleChange = activeAnimations && activeAnimations->isAnimationStyleChange();
 
 #if !ENABLE(ASSERT)
     // If we're in an animation style change, no animations can have started, been cancelled or changed play state.
     // When ASSERT is enabled, we verify this optimization.
     if (isAnimationStyleChange)
         return;
@@ skipping 554 matching lines @@
     visitor->trace(m_activeInterpolationsForAnimations);
     visitor->trace(m_activeInterpolationsForTransitions);
     visitor->trace(m_newAnimations);
     visitor->trace(m_suppressedAnimationPlayers);
     visitor->trace(m_animationsWithUpdates);
     visitor->trace(m_animationsWithStyleUpdates);
 #endif
 }
 
 } // namespace blink