Make CSSAnimationUpdate stack-allocated

Source/core/animation/css/CSSAnimations.h

 /*
  * 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 19 matching lines @@
 
 #ifndef CSSAnimations_h
 #define CSSAnimations_h
 
 #include "core/animation/InertEffect.h"
 #include "core/animation/Interpolation.h"
 #include "core/animation/css/CSSAnimationData.h"
 #include "core/animation/css/CSSAnimationUpdate.h"
 #include "core/css/CSSKeyframesRule.h"
 #include "core/css/StylePropertySet.h"
+#include "core/css/resolver/StyleResolverState.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "wtf/HashMap.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 class CSSTransitionData;
 class Element;
 class StylePropertyShorthand;
 class StyleResolver;
 
 class CSSAnimations final {
     WTF_MAKE_NONCOPYABLE(CSSAnimations);
     DISALLOW_ALLOCATION();
 public:
     CSSAnimations();
 
     bool isAnimationForInspector(const Animation&);
     bool isTransitionAnimationForInspector(const Animation&) const;
 
     static const StylePropertyShorthand& propertiesForTransitionAll();
     static bool isAnimatableProperty(CSSPropertyID);
-    static PassOwnPtrWillBeRawPtr<CSSAnimationUpdate> calculateUpdate(const Element* animatingElement, Element&, const ComputedStyle&, ComputedStyle* parentStyle, StyleResolver*);
+    static void calculateUpdate(const Element* animatingElement, Element&, StyleResolverState&, StyleResolver*);
 
-    void setPendingUpdate(PassOwnPtrWillBeRawPtr<CSSAnimationUpdate> update) { m_pendingUpdate = update; }
+    void setPendingUpdate(const CSSAnimationUpdate& update)
+    {
+        clearPendingUpdate();
+        m_pendingUpdate.setPendingUpdate(update);
+    }
+    void clearPendingUpdate()
+    {
+        m_pendingUpdate.clear();
+    }
     void maybeApplyPendingUpdate(Element*);
-    bool isEmpty() const { return m_animations.isEmpty() && m_transitions.isEmpty() && !m_pendingUpdate; }
+    bool isEmpty() const { return m_animations.isEmpty() && m_transitions.isEmpty() && m_pendingUpdate.isEmpty(); }
     void cancel();
 
     DECLARE_TRACE();
 
 private:
     class RunningAnimation final : public RefCountedWillBeGarbageCollectedFinalized<RunningAnimation> {
     public:
         RunningAnimation(PassRefPtrWillBeRawPtr<Animation> animation, CSSAnimationUpdate::NewAnimation newAnimation)
             : animation(animation)
             , specifiedTiming(newAnimation.timing)
@@ skipping 35 matching lines @@
         RawPtrWillBeMember<const AnimatableValue> from;
         RawPtrWillBeMember<const AnimatableValue> to;
     };
 
     using AnimationMap = WillBeHeapHashMap<AtomicString, RefPtrWillBeMember<RunningAnimation>>;
     AnimationMap m_animations;
 
     using TransitionMap = WillBeHeapHashMap<CSSPropertyID, RunningTransition>;
     TransitionMap m_transitions;
 
-    OwnPtrWillBeMember<CSSAnimationUpdate> m_pendingUpdate;
+    PendingAnimationUpdate m_pendingUpdate;
 
     ActiveInterpolationMap m_previousActiveInterpolationsForAnimations;
 
-    static void calculateAnimationUpdate(CSSAnimationUpdate*, const Element* animatingElement, Element&, const ComputedStyle&, ComputedStyle* parentStyle, StyleResolver*);
-    static void calculateTransitionUpdate(CSSAnimationUpdate*, const Element* animatingElement, const ComputedStyle&);
-    static void calculateTransitionUpdateForProperty(CSSPropertyID, const CSSTransitionData&, size_t transitionIndex, const ComputedStyle& oldStyle, const ComputedStyle&, const TransitionMap* activeTransitions, CSSAnimationUpdate*, const Element*);
+    static void calculateAnimationUpdate(CSSAnimationUpdate&, const Element* animatingElement, Element&, const ComputedStyle&, ComputedStyle* parentStyle, StyleResolver*);
+    static void calculateTransitionUpdate(CSSAnimationUpdate&, const Element* animatingElement, const ComputedStyle&);
+    static void calculateTransitionUpdateForProperty(CSSPropertyID, const CSSTransitionData&, size_t transitionIndex, const ComputedStyle& oldStyle, const ComputedStyle&, const TransitionMap* activeTransitions, CSSAnimationUpdate&, const Element*);
 
-    static void calculateAnimationActiveInterpolations(CSSAnimationUpdate*, const Element* animatingElement, double timelineCurrentTime);
-    static void calculateTransitionActiveInterpolations(CSSAnimationUpdate*, const Element* animatingElement, double timelineCurrentTime);
+    static void calculateAnimationActiveInterpolations(CSSAnimationUpdate&, const Element* animatingElement, double timelineCurrentTime);
+    static void calculateTransitionActiveInterpolations(CSSAnimationUpdate&, const Element* animatingElement, double timelineCurrentTime);
 
     class AnimationEventDelegate final : public AnimationEffect::EventDelegate {
     public:
         AnimationEventDelegate(Element* animationTarget, const AtomicString& name)
             : m_animationTarget(animationTarget)
             , m_name(name)
             , m_previousPhase(AnimationEffect::PhaseNone)
             , m_previousIteration(nullValue())
         {
         }
@@ skipping 33 matching lines @@
 
         RawPtrWillBeMember<Element> m_transitionTarget;
         const CSSPropertyID m_property;
         AnimationEffect::Phase m_previousPhase;
     };
 };
 
 } // namespace blink
 
 #endif