Web Animations: Use legacy cascade behaviour and the MatchedPropertiesCache

Source/core/css/resolver/StyleResolver.h

Index: Source/core/css/resolver/StyleResolver.h
diff --git a/Source/core/css/resolver/StyleResolver.h b/Source/core/css/resolver/StyleResolver.h
index e31575ce0251394f048014bcd2c01d7075c692c0..90bf0f79126ebf6b8f8f7805f119d00c833e0541 100644
--- a/Source/core/css/resolver/StyleResolver.h
+++ b/Source/core/css/resolver/StyleResolver.h
@@ -241,6 +241,7 @@ private:
     bool fastRejectSelector(const RuleData&) const;
 
     void applyMatchedProperties(StyleResolverState&, const MatchResult&, Element* animatingElement);
+    void applyAnimatedProperties(StyleResolverState&, Element* animatingElement);
 
     enum StyleApplicationPass {
         VariableDefinitions,
@@ -255,7 +256,7 @@ private:
     template <StyleApplicationPass pass>
     void applyProperties(StyleResolverState&, const StylePropertySet* properties, StyleRule*, bool isImportant, bool inheritedOnly, PropertyWhitelistType = PropertyWhitelistNone);
     template <StyleApplicationPass pass>
-    bool applyAnimatedProperties(StyleResolverState&, const AnimationEffect::CompositableValueMap&);
+    void applyAnimatedProperties(StyleResolverState&, const AnimationEffect::CompositableValueMap&);
     void matchPageRules(MatchResult&, RuleSet*, bool isLeftPage, bool isFirstPage, const String& pageName);
     void matchPageRulesForList(Vector<StyleRulePage*>& matchedRules, const Vector<StyleRulePage*>&, bool isLeftPage, bool isFirstPage, const String& pageName);
     void collectViewportRules();