Web Animations CSS: Record if style recalc is for animation

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index 36485390723f6e64708292b3bc8c29698978ce23..1dec7bd36ca948ff5c4ae4e393a9308081ff5cbc 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -1534,6 +1534,11 @@ void Element::recalcStyle(StyleRecalcChange change, Text* nextTextSibling)
             ElementRareData* data = elementRareData();
             data->resetStyleState();
             data->clearComputedStyle();
+
+            if (change >= Inherit) {
+                if (ActiveAnimations* activeAnimations = data->activeAnimations())
+                    activeAnimations->setAnimationStyleChange(false);
+            }
         }
         if (parentRenderStyle())
             change = recalcOwnStyle(change);
@@ -1723,6 +1728,21 @@ void Element::didAffectSelector(AffectedSelectorMask mask)
         elementShadow->didAffectSelector(mask);
 }
 
+void Element::setAnimationStyleChange(bool animationStyleChange)
+{
+    if (ActiveAnimations* activeAnimations = elementRareData()->activeAnimations())
+        activeAnimations->setAnimationStyleChange(animationStyleChange);
+}
+
+void Element::setNeedsAnimationStyleRecalc()
+{
+    if (styleChangeType() != NoStyleChange)
+        return;
+
+    setNeedsStyleRecalc(LocalStyleChange, StyleChangeFromRenderer);
+    setAnimationStyleChange(true);
+}
+
 PassRefPtr<ShadowRoot> Element::createShadowRoot(ExceptionState& exceptionState)
 {
     if (alwaysCreateUserAgentShadowRoot())