Web Animations CSS: Record if style recalc is for animation

Source/core/dom/Node.cpp

Index: Source/core/dom/Node.cpp
diff --git a/Source/core/dom/Node.cpp b/Source/core/dom/Node.cpp
index 3d9779de4eb41f7976fa92805f967a08902fd613..732655e8f2eede7a2e3e5bd54ad32bbe9644484f 100644
--- a/Source/core/dom/Node.cpp
+++ b/Source/core/dom/Node.cpp
@@ -790,6 +790,18 @@ void Node::setNeedsStyleRecalc(StyleChangeType changeType, StyleChangeSource sou
 
     if (existingChangeType == NoStyleChange)
         markAncestorsWithChildNeedsStyleRecalc();
+
+    if (isElementNode() && hasRareData())
+        toElement(*this).setAnimationStyleChange(false);
+}
+
+void Node::clearNeedsStyleRecalc()
+{
+    m_nodeFlags &= ~StyleChangeMask;
+    clearFlag(NotifyRendererWithIdenticalStyles);
+
+    if (isElementNode() && hasRareData())
+        toElement(*this).setAnimationStyleChange(false);
 }
 
 bool Node::inActiveDocument() const