Make blink classes and structures in core/css fast-allocated

Source/core/css/RuleFeature.h

Index: Source/core/css/RuleFeature.h
diff --git a/Source/core/css/RuleFeature.h b/Source/core/css/RuleFeature.h
index 1d72898c6d66fad92d7eb5a35f162328ee896547..b4d0963f4e013cbb40e97bcb26f8ac5008003408 100644
--- a/Source/core/css/RuleFeature.h
+++ b/Source/core/css/RuleFeature.h
@@ -105,6 +105,7 @@ private:
     using PseudoTypeInvalidationSetMap = WillBeHeapHashMap<CSSSelector::PseudoType, RefPtrWillBeMember<DescendantInvalidationSet>, WTF::IntHash<unsigned>, WTF::UnsignedWithZeroKeyHashTraits<unsigned>>;
 
     struct FeatureMetadata {
+        DISALLOW_ALLOCATION();
         FeatureMetadata()
             : usesFirstLineRules(false)
             , usesWindowInactiveSelector(false)
@@ -131,6 +132,7 @@ private:
     void updateInvalidationSetsForContentAttribute(const RuleData&);
 
     struct InvalidationSetFeatures {
+        DISALLOW_ALLOCATION();
         InvalidationSetFeatures()
             : customPseudoElement(false)
             , hasBeforeOrAfter(false)