Make CSSAnimationUpdate stack-allocated

Source/core/animation/css/CSSAnimations.cpp

Index: Source/core/animation/css/CSSAnimations.cpp
diff --git a/Source/core/animation/css/CSSAnimations.cpp b/Source/core/animation/css/CSSAnimations.cpp
index 48c7f5cd54caf7f8c7b706297278be2066d5daa3..95479452b92a8f82dd6915ea876bfe8758147cc8 100644
--- a/Source/core/animation/css/CSSAnimations.cpp
+++ b/Source/core/animation/css/CSSAnimations.cpp
@@ -200,17 +200,15 @@ bool CSSAnimations::isTransitionAnimationForInspector(const Animation& animation
     return false;
 }
 
-PassOwnPtrWillBeRawPtr<CSSAnimationUpdate> CSSAnimations::calculateUpdate(const Element* animatingElement, Element& element, const ComputedStyle& style, ComputedStyle* parentStyle, StyleResolver* resolver)
+void CSSAnimations::calculateUpdate(const Element* animatingElement, Element& element, const ComputedStyle& style, ComputedStyle* parentStyle, CSSAnimationUpdate& animationUpdate, 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();
+    calculateAnimationUpdate(animationUpdate, animatingElement, element, style, parentStyle, resolver);
+    calculateAnimationActiveInterpolations(animationUpdate, animatingElement, element.document().timeline().currentTimeInternal());
+    calculateTransitionUpdate(animationUpdate, animatingElement, style);
+    calculateTransitionActiveInterpolations(animationUpdate, animatingElement, element.document().timeline().currentTimeInternal());
 }
 
-void CSSAnimations::calculateAnimationUpdate(CSSAnimationUpdate* update, const Element* animatingElement, Element& element, const ComputedStyle& style, ComputedStyle* parentStyle, StyleResolver* resolver)
+void CSSAnimations::calculateAnimationUpdate(CSSAnimationUpdate& update, const Element* animatingElement, Element& element, const ComputedStyle& style, ComputedStyle* parentStyle, StyleResolver* resolver)
 {
     const ElementAnimations* elementAnimations = animatingElement ? animatingElement->elementAnimations() : nullptr;
 
@@ -260,7 +258,7 @@ void CSSAnimations::calculateAnimationUpdate(CSSAnimationUpdate* update, const E
 
                     if (keyframesRule != runningAnimation->styleRule || keyframesRule->version() != runningAnimation->styleRuleVersion || runningAnimation->specifiedTiming != specifiedTiming) {
                         ASSERT(!isAnimationStyleChange);
-                        update->updateAnimation(animationName, animation, InertEffect::create(
+                        update.updateAnimation(animationName, animation, InertEffect::create(
                             createKeyframeEffectModel(resolver, animatingElement, element, &style, parentStyle, animationName, keyframeTimingFunction.get()),
                             timing, isPaused, animation->unlimitedCurrentTimeInternal()), specifiedTiming, keyframesRule);
                     } else if (!isAnimationStyleChange && animation->effect() && animation->effect()->isAnimation()) {
@@ -268,13 +266,13 @@ void CSSAnimations::calculateAnimationUpdate(CSSAnimationUpdate* update, const E
                         if (model && model->isKeyframeEffectModel()) {
                             KeyframeEffectModelBase* keyframeEffect = toKeyframeEffectModelBase(model);
                             if (keyframeEffect->hasSyntheticKeyframes())
-                                update->updateAnimationStyle(animation, keyframeEffect, animatingElement->layoutObject(), style);
+                                update.updateAnimationStyle(animation, keyframeEffect, animatingElement->layoutObject(), style);
                         }
                     }
 
                     if (isPaused != animation->paused()) {
                         ASSERT(!isAnimationStyleChange);
-                        update->toggleAnimationPaused(animationName);
+                        update.toggleAnimationPaused(animationName);
                     }
 
                     continue;
@@ -282,7 +280,7 @@ void CSSAnimations::calculateAnimationUpdate(CSSAnimationUpdate* update, const E
             }
 
             ASSERT(!isAnimationStyleChange);
-            update->startAnimation(animationName, InertEffect::create(
+            update.startAnimation(animationName, InertEffect::create(
                 createKeyframeEffectModel(resolver, animatingElement, element, &style, parentStyle, animationName, keyframeTimingFunction.get()),
                 timing, isPaused, 0), specifiedTiming, keyframesRule);
         }
@@ -291,33 +289,31 @@ void CSSAnimations::calculateAnimationUpdate(CSSAnimationUpdate* update, const E
     ASSERT(inactive.isEmpty() || cssAnimations);
     for (const AtomicString& animationName : inactive) {
         ASSERT(!isAnimationStyleChange);
-        update->cancelAnimation(animationName, *cssAnimations->m_animations.get(animationName)->animation);
+        update.cancelAnimation(animationName, *cssAnimations->m_animations.get(animationName)->animation);
     }
 }
 
 void CSSAnimations::maybeApplyPendingUpdate(Element* element)
 {
-    if (!m_pendingUpdate) {
+    if (m_pendingUpdate.isEmpty()) {
         m_previousActiveInterpolationsForAnimations.clear();
         return;
     }
 
-    OwnPtrWillBeRawPtr<CSSAnimationUpdate> update = m_pendingUpdate.release();
-
-    m_previousActiveInterpolationsForAnimations.swap(update->activeInterpolationsForAnimations());
+    m_previousActiveInterpolationsForAnimations.swap(m_pendingUpdate.activeInterpolationsForAnimations());
 
     // FIXME: cancelling, pausing, unpausing animations all query compositingState, which is not necessarily up to date here
     // since we call this from recalc style.
     // https://code.google.com/p/chromium/issues/detail?id=339847
     DisableCompositingQueryAsserts disabler;
 
-    for (const AtomicString& animationName : update->cancelledAnimationNames()) {
+    for (const AtomicString& animationName : m_pendingUpdate.cancelledAnimationNames()) {
         RefPtrWillBeRawPtr<Animation> animation = m_animations.take(animationName)->animation;
         animation->cancel();
         animation->update(TimingUpdateOnDemand);
     }
 
-    for (const AtomicString& animationName : update->animationsWithPauseToggled()) {
+    for (const AtomicString& animationName : m_pendingUpdate.animationsWithPauseToggled()) {
         Animation* animation = m_animations.get(animationName)->animation.get();
         if (animation->paused())
             animation->unpause();
@@ -327,7 +323,7 @@ void CSSAnimations::maybeApplyPendingUpdate(Element* element)
             animation->update(TimingUpdateOnDemand);
     }
 
-    for (const auto& styleUpdate : update->animationsWithStyleUpdates()) {
+    for (const auto& styleUpdate : m_pendingUpdate.animationsWithStyleUpdates()) {
         styleUpdate.model->forEachInterpolation([](Interpolation& interpolation) {
             if (interpolation.isStyleInterpolation() && toStyleInterpolation(interpolation).isDeferredLegacyStyleInterpolation())
                 toDeferredLegacyStyleInterpolation(toStyleInterpolation(interpolation)).underlyingStyleChanged();
@@ -346,7 +342,7 @@ void CSSAnimations::maybeApplyPendingUpdate(Element* element)
         }
     }
 
-    for (const auto& entry : update->animationsWithUpdates()) {
+    for (const auto& entry : m_pendingUpdate.animationsWithUpdates()) {
         KeyframeEffect* effect = toKeyframeEffect(entry.animation->effect());
 
         effect->setModel(entry.effect->model());
@@ -355,7 +351,7 @@ void CSSAnimations::maybeApplyPendingUpdate(Element* element)
         m_animations.find(entry.name)->value->update(entry);
     }
 
-    for (const auto& entry : update->newAnimations()) {
+    for (const auto& entry : m_pendingUpdate.newAnimations()) {
         const InertEffect* inertAnimation = entry.effect.get();
         OwnPtrWillBeRawPtr<AnimationEventDelegate> eventDelegate = adoptPtrWillBeNoop(new AnimationEventDelegate(element, entry.name));
         RefPtrWillBeRawPtr<KeyframeEffect> effect = KeyframeEffect::create(element, inertAnimation->model(), inertAnimation->specifiedTiming(), KeyframeEffect::DefaultPriority, eventDelegate.release());
@@ -374,12 +370,12 @@ void CSSAnimations::maybeApplyPendingUpdate(Element* element)
     // recalculation, we find these cases by searching for new transitions that
     // have matching cancelled animation property IDs on the compositor.
     WillBeHeapHashMap<CSSPropertyID, std::pair<RefPtrWillBeMember<KeyframeEffect>, double>> retargetedCompositorTransitions;
-    for (CSSPropertyID id : update->cancelledTransitions()) {
+    for (CSSPropertyID id : m_pendingUpdate.cancelledTransitions()) {
         ASSERT(m_transitions.contains(id));
 
         RefPtrWillBeRawPtr<Animation> animation = m_transitions.take(id).animation;
         KeyframeEffect* effect = toKeyframeEffect(animation->effect());
-        if (effect->hasActiveAnimationsOnCompositor(id) && update->newTransitions().find(id) != update->newTransitions().end() && !animation->limited())
+        if (effect->hasActiveAnimationsOnCompositor(id) && m_pendingUpdate.newTransitions().find(id) != m_pendingUpdate.newTransitions().end() && !animation->limited())
             retargetedCompositorTransitions.add(id, std::pair<RefPtrWillBeMember<KeyframeEffect>, double>(effect, animation->startTimeInternal()));
         animation->cancel();
         // after cancelation, transitions must be downgraded or they'll fail
@@ -390,7 +386,7 @@ void CSSAnimations::maybeApplyPendingUpdate(Element* element)
         animation->update(TimingUpdateOnDemand);
     }
 
-    for (CSSPropertyID id : update->finishedTransitions()) {
+    for (CSSPropertyID id : m_pendingUpdate.finishedTransitions()) {
         // This transition can also be cancelled and finished at the same time
         if (m_transitions.contains(id)) {
             RefPtrWillBeRawPtr<Animation> animation = m_transitions.take(id).animation;
@@ -400,7 +396,7 @@ void CSSAnimations::maybeApplyPendingUpdate(Element* element)
         }
     }
 
-    for (const auto& entry : update->newTransitions()) {
+    for (const auto& entry : m_pendingUpdate.newTransitions()) {
         const CSSAnimationUpdate::NewTransition& newTransition = entry.value;
 
         RunningTransition runningTransition;
@@ -451,9 +447,11 @@ void CSSAnimations::maybeApplyPendingUpdate(Element* element)
         ASSERT(id != CSSPropertyInvalid);
         Platform::current()->histogramSparse("WebCore.Animation.CSSProperties", UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(id));
     }
+
+    clearPendingUpdate();
 }
 
-void CSSAnimations::calculateTransitionUpdateForProperty(CSSPropertyID id, const CSSTransitionData& transitionData, size_t transitionIndex, const ComputedStyle& oldStyle, const ComputedStyle& style, const TransitionMap* activeTransitions, CSSAnimationUpdate* update, const Element* element)
+void CSSAnimations::calculateTransitionUpdateForProperty(CSSPropertyID id, const CSSTransitionData& transitionData, size_t transitionIndex, const ComputedStyle& oldStyle, const ComputedStyle& style, const TransitionMap* activeTransitions, CSSAnimationUpdate& update, const Element* element)
 {
     RefPtrWillBeRawPtr<AnimatableValue> to = nullptr;
     if (activeTransitions) {
@@ -463,7 +461,7 @@ void CSSAnimations::calculateTransitionUpdateForProperty(CSSPropertyID id, const
             const AnimatableValue* activeTo = activeTransitionIter->value.to;
             if (to->equals(activeTo))
                 return;
-            update->cancelTransition(id);
+            update.cancelTransition(id);
             ASSERT(!element->elementAnimations() || !element->elementAnimations()->isAnimationStyleChange());
         }
     }
@@ -510,11 +508,11 @@ void CSSAnimations::calculateTransitionUpdateForProperty(CSSPropertyID id, const
     keyframes.append(endKeyframe);
 
     RefPtrWillBeRawPtr<AnimatableValueKeyframeEffectModel> model = AnimatableValueKeyframeEffectModel::create(keyframes);
-    update->startTransition(id, from.get(), to.get(), InertEffect::create(model, timing, false, 0));
+    update.startTransition(id, from.get(), to.get(), InertEffect::create(model, timing, false, 0));
     ASSERT(!element->elementAnimations() || !element->elementAnimations()->isAnimationStyleChange());
 }
 
-void CSSAnimations::calculateTransitionUpdate(CSSAnimationUpdate* update, const Element* animatingElement, const ComputedStyle& style)
+void CSSAnimations::calculateTransitionUpdate(CSSAnimationUpdate& update, const Element* animatingElement, const ComputedStyle& style)
 {
     if (!animatingElement)
         return;
@@ -563,7 +561,7 @@ void CSSAnimations::calculateTransitionUpdate(CSSAnimationUpdate* update, const
                 // FIXME: We should transition if an !important property changes even when an animation is running,
                 // but this is a bit hard to do with the current applyMatchedProperties system.
                 PropertyHandle property = PropertyHandle(id);
-                if (!update->activeInterpolationsForAnimations().contains(property)
+                if (!update.activeInterpolationsForAnimations().contains(property)
                     && (!elementAnimations || !elementAnimations->cssAnimations().m_previousActiveInterpolationsForAnimations.contains(property))) {
                     calculateTransitionUpdateForProperty(id, *transitionData, i, oldStyle, style, activeTransitions, update, animatingElement);
                 }
@@ -577,9 +575,9 @@ void CSSAnimations::calculateTransitionUpdate(CSSAnimationUpdate* update, const
             if (!anyTransitionHadTransitionAll && !animationStyleRecalc && !listedProperties.get(id)) {
                 // TODO: Figure out why this fails on Chrome OS login page. crbug.com/365507
                 // ASSERT(animation.playStateInternal() == Animation::Finished || !(elementAnimations && elementAnimations->isAnimationStyleChange()));
-                update->cancelTransition(id);
+                update.cancelTransition(id);
             } else if (entry.value.animation->finishedInternal()) {
-                update->finishTransition(id);
+                update.finishTransition(id);
             }
         }
     }
@@ -598,49 +596,48 @@ void CSSAnimations::cancel()
     }
 
     m_animations.clear();
-    m_transitions.clear();
-    m_pendingUpdate = nullptr;
+    clearPendingUpdate();
 }
 
-void CSSAnimations::calculateAnimationActiveInterpolations(CSSAnimationUpdate* update, const Element* animatingElement, double timelineCurrentTime)
+void CSSAnimations::calculateAnimationActiveInterpolations(CSSAnimationUpdate& update, const Element* animatingElement, double timelineCurrentTime)
 {
     ElementAnimations* elementAnimations = animatingElement ? animatingElement->elementAnimations() : nullptr;
     AnimationStack* animationStack = elementAnimations ? &elementAnimations->defaultStack() : nullptr;
 
-    if (update->newAnimations().isEmpty() && update->suppressedAnimations().isEmpty()) {
+    if (update.newAnimations().isEmpty() && update.suppressedAnimations().isEmpty()) {
         ActiveInterpolationMap activeInterpolationsForAnimations(AnimationStack::activeInterpolations(animationStack, 0, 0, KeyframeEffect::DefaultPriority, timelineCurrentTime));
-        update->adoptActiveInterpolationsForAnimations(activeInterpolationsForAnimations);
+        update.adoptActiveInterpolationsForAnimations(activeInterpolationsForAnimations);
         return;
     }
 
     WillBeHeapVector<RawPtrWillBeMember<InertEffect>> newEffects;
-    for (const auto& newAnimation : update->newAnimations())
+    for (const auto& newAnimation : update.newAnimations())
         newEffects.append(newAnimation.effect.get());
-    for (const auto& updatedAnimation : update->animationsWithUpdates())
+    for (const auto& updatedAnimation : update.animationsWithUpdates())
         newEffects.append(updatedAnimation.effect.get()); // Animations with updates use a temporary InertEffect for the current frame.
 
-    ActiveInterpolationMap activeInterpolationsForAnimations(AnimationStack::activeInterpolations(animationStack, &newEffects, &update->suppressedAnimations(), KeyframeEffect::DefaultPriority, timelineCurrentTime));
-    update->adoptActiveInterpolationsForAnimations(activeInterpolationsForAnimations);
+    ActiveInterpolationMap activeInterpolationsForAnimations(AnimationStack::activeInterpolations(animationStack, &newEffects, &update.suppressedAnimations(), KeyframeEffect::DefaultPriority, timelineCurrentTime));
+    update.adoptActiveInterpolationsForAnimations(activeInterpolationsForAnimations);
 }
 
-void CSSAnimations::calculateTransitionActiveInterpolations(CSSAnimationUpdate* update, const Element* animatingElement, double timelineCurrentTime)
+void CSSAnimations::calculateTransitionActiveInterpolations(CSSAnimationUpdate& update, const Element* animatingElement, double timelineCurrentTime)
 {
     ElementAnimations* elementAnimations = animatingElement ? animatingElement->elementAnimations() : nullptr;
     AnimationStack* animationStack = elementAnimations ? &elementAnimations->defaultStack() : nullptr;
 
     ActiveInterpolationMap activeInterpolationsForTransitions;
-    if (update->newTransitions().isEmpty() && update->cancelledTransitions().isEmpty()) {
+    if (update.newTransitions().isEmpty() && update.cancelledTransitions().isEmpty()) {
         activeInterpolationsForTransitions = AnimationStack::activeInterpolations(animationStack, 0, 0, KeyframeEffect::TransitionPriority, timelineCurrentTime);
     } else {
         WillBeHeapVector<RawPtrWillBeMember<InertEffect>> newTransitions;
-        for (const auto& entry : update->newTransitions())
+        for (const auto& entry : update.newTransitions())
             newTransitions.append(entry.value.effect.get());
 
         WillBeHeapHashSet<RawPtrWillBeMember<const Animation>> cancelledAnimations;
-        if (!update->cancelledTransitions().isEmpty()) {
+        if (!update.cancelledTransitions().isEmpty()) {
             ASSERT(elementAnimations);
             const TransitionMap& transitionMap = elementAnimations->cssAnimations().m_transitions;
-            for (CSSPropertyID id : update->cancelledTransitions()) {
+            for (CSSPropertyID id : update.cancelledTransitions()) {
                 ASSERT(transitionMap.contains(id));
                 cancelledAnimations.add(transitionMap.get(id).animation.get());
             }
@@ -650,11 +647,11 @@ void CSSAnimations::calculateTransitionActiveInterpolations(CSSAnimationUpdate*
     }
 
     // Properties being animated by animations don't get values from transitions applied.
-    if (!update->activeInterpolationsForAnimations().isEmpty() && !activeInterpolationsForTransitions.isEmpty()) {
-        for (const auto& entry : update->activeInterpolationsForAnimations())
+    if (!update.activeInterpolationsForAnimations().isEmpty() && !activeInterpolationsForTransitions.isEmpty()) {
+        for (const auto& entry : update.activeInterpolationsForAnimations())
             activeInterpolationsForTransitions.remove(entry.key);
     }
-    update->adoptActiveInterpolationsForTransitions(activeInterpolationsForTransitions);
+    update.adoptActiveInterpolationsForTransitions(activeInterpolationsForTransitions);
 }
 
 EventTarget* CSSAnimations::AnimationEventDelegate::eventTarget() const
@@ -798,17 +795,4 @@ DEFINE_TRACE(CSSAnimations)
 #endif
 }
 
-DEFINE_TRACE(CSSAnimationUpdate)
-{
-#if ENABLE(OILPAN)
-    visitor->trace(m_newTransitions);
-    visitor->trace(m_activeInterpolationsForAnimations);
-    visitor->trace(m_activeInterpolationsForTransitions);
-    visitor->trace(m_newAnimations);
-    visitor->trace(m_suppressedAnimations);
-    visitor->trace(m_animationsWithUpdates);
-    visitor->trace(m_animationsWithStyleUpdates);
-#endif
-}
-
 } // namespace blink