Prepare for responsive CSS animations.

Source/core/animation/css/CSSAnimationUpdate.h

Index: Source/core/animation/css/CSSAnimationUpdate.h
diff --git a/Source/core/animation/css/CSSAnimationUpdate.h b/Source/core/animation/css/CSSAnimationUpdate.h
index 9ae2286f746dbd4b4e787f1ce25a9d8346e814a7..10e162cafed842878c218ceff14fdf47160fad00 100644
--- a/Source/core/animation/css/CSSAnimationUpdate.h
+++ b/Source/core/animation/css/CSSAnimationUpdate.h
@@ -14,11 +14,58 @@ namespace blink {
 
 class AnimationPlayer;
 class InertAnimation;
+class KeyframeEffectModelBase;
 
 // This class stores the CSS Animations/Transitions information we use during a style recalc.
 // This includes updates to animations/transitions as well as the Interpolations to be applied.
 class CSSAnimationUpdate final : public NoBaseWillBeGarbageCollectedFinalized<CSSAnimationUpdate> {
 public:
+    struct NewAnimation {
+        ALLOW_ONLY_INLINE_ALLOCATION();
+    public:
+        void trace(Visitor* visitor)
+        {
+            visitor->trace(animation);
+        }
+
+        AtomicString name;
+        RefPtrWillBeMember<InertAnimation> animation;
+    };
+
+    struct UpdatedAnimationTiming {
+        ALLOW_ONLY_INLINE_ALLOCATION();
+    public:
+        void trace(Visitor* visitor)
+        {
+            visitor->trace(player);
+            visitor->trace(animation);
+        }
+
+        RawPtrWillBeMember<AnimationPlayer> player;
+        RefPtrWillBeMember<InertAnimation> animation;
+        Timing newTiming;
+    };
+
+    struct UpdatedAnimationStyle {
+        ALLOW_ONLY_INLINE_ALLOCATION();
+    public:
+        void trace(Visitor* visitor)
+        {
+            visitor->trace(player);
+            visitor->trace(effect);
+        }
+
+        struct CompositableStyleSnapshot {
+            RefPtrWillBeMember<AnimatableValue> opacity;
+            RefPtrWillBeMember<AnimatableValue> transform;
+            RefPtrWillBeMember<AnimatableValue> webkitFilter;
+        };
+
+        RawPtrWillBeMember<AnimationPlayer> player;
+        RawPtrWillBeMember<KeyframeEffectModelBase> effect;
+        CompositableStyleSnapshot snapshot;
+    };
+
     void startAnimation(const AtomicString& animationName, PassRefPtrWillBeRawPtr<InertAnimation> animation)
     {
         animation->setName(animationName);
@@ -47,6 +94,14 @@ public:
         m_animationsWithTimingUpdates.append(updatedAnimation);
         m_suppressedAnimationPlayers.add(player);
     }
+    void updateAnimationStyle(AnimationPlayer* player, KeyframeEffectModelBase* effect, const UpdatedAnimationStyle::CompositableStyleSnapshot& snapshot)
+    {
+        UpdatedAnimationStyle updatedAnimation;
+        updatedAnimation.player = player;
+        updatedAnimation.effect = effect;
+        updatedAnimation.snapshot = snapshot;
+        m_animationsWithStyleUpdates.append(updatedAnimation);
+    }
 
     void startTransition(CSSPropertyID id, CSSPropertyID eventId, const AnimatableValue* from, const AnimatableValue* to, PassRefPtrWillBeRawPtr<InertAnimation> animation)
     {
@@ -62,37 +117,12 @@ public:
     bool isCancelledTransition(CSSPropertyID id) const { return m_cancelledTransitions.contains(id); }
     void cancelTransition(CSSPropertyID id) { m_cancelledTransitions.add(id); }
 
-    struct NewAnimation {
-        ALLOW_ONLY_INLINE_ALLOCATION();
-    public:
-        void trace(Visitor* visitor)
-        {
-            visitor->trace(animation);
-        }
-
-        AtomicString name;
-        RefPtrWillBeMember<InertAnimation> animation;
-    };
-
-    struct UpdatedAnimationTiming {
-        ALLOW_ONLY_INLINE_ALLOCATION();
-    public:
-        void trace(Visitor* visitor)
-        {
-            visitor->trace(player);
-            visitor->trace(animation);
-        }
-
-        RawPtrWillBeMember<AnimationPlayer> player;
-        RefPtrWillBeMember<InertAnimation> animation;
-        Timing newTiming;
-    };
-
     const WillBeHeapVector<NewAnimation>& newAnimations() const { return m_newAnimations; }
     const Vector<AtomicString>& cancelledAnimationNames() const { return m_cancelledAnimationNames; }
     const WillBeHeapHashSet<RawPtrWillBeMember<const AnimationPlayer>>& suppressedAnimationAnimationPlayers() const { return m_suppressedAnimationPlayers; }
     const Vector<AtomicString>& animationsWithPauseToggled() const { return m_animationsWithPauseToggled; }
     const WillBeHeapVector<UpdatedAnimationTiming>& animationsWithTimingUpdates() const { return m_animationsWithTimingUpdates; }
+    const WillBeHeapVector<UpdatedAnimationStyle>& animationsWithStyleUpdates() const { return m_animationsWithStyleUpdates; }
 
     struct NewTransition {
         ALLOW_ONLY_INLINE_ALLOCATION();
@@ -127,6 +157,7 @@ public:
             && m_suppressedAnimationPlayers.isEmpty()
             && m_animationsWithPauseToggled.isEmpty()
             && m_animationsWithTimingUpdates.isEmpty()
+            && m_animationsWithStyleUpdates.isEmpty()
             && m_newTransitions.isEmpty()
             && m_cancelledTransitions.isEmpty()
             && m_activeInterpolationsForAnimations.isEmpty()
@@ -145,6 +176,7 @@ private:
     WillBeHeapHashSet<RawPtrWillBeMember<const AnimationPlayer>> m_suppressedAnimationPlayers;
     Vector<AtomicString> m_animationsWithPauseToggled;
     WillBeHeapVector<UpdatedAnimationTiming> m_animationsWithTimingUpdates;
+    WillBeHeapVector<UpdatedAnimationStyle> m_animationsWithStyleUpdates;
 
     NewTransitionMap m_newTransitions;
     HashSet<CSSPropertyID> m_cancelledTransitions;