Pass around CSSSelector by reference instead of pointer

Source/core/dom/shadow/SelectRuleFeatureSet.cpp

Index: Source/core/dom/shadow/SelectRuleFeatureSet.cpp
diff --git a/Source/core/dom/shadow/SelectRuleFeatureSet.cpp b/Source/core/dom/shadow/SelectRuleFeatureSet.cpp
index 4f6f52668ef8b653340189160284859f1cb7bdf1..02ab9488fc36a42faff5c91c7eaf4845f0efe419 100644
--- a/Source/core/dom/shadow/SelectRuleFeatureSet.cpp
+++ b/Source/core/dom/shadow/SelectRuleFeatureSet.cpp
@@ -52,11 +52,11 @@ void SelectRuleFeatureSet::clear()
     m_featureFlags = 0;
 }
 
-void SelectRuleFeatureSet::collectFeaturesFromSelector(const CSSSelector* selector)
+void SelectRuleFeatureSet::collectFeaturesFromSelector(const CSSSelector& selector)
 {
     m_cssRuleFeatureSet.collectFeaturesFromSelector(selector);
 
-    switch (selector->pseudoType()) {
+    switch (selector.pseudoType()) {
     case CSSSelector::PseudoChecked:
         setSelectRuleFeature(AffectedSelectorChecked);
         break;