Pass around CSSSelector by reference instead of pointer

Source/core/dom/shadow/ElementShadow.cpp

Index: Source/core/dom/shadow/ElementShadow.cpp
diff --git a/Source/core/dom/shadow/ElementShadow.cpp b/Source/core/dom/shadow/ElementShadow.cpp
index 779b03390c4c51e6d1251d9ed5c9ae9b64b8a3bb..1334e2a3952cc19171c9cb0edf065ca499966daa 100644
--- a/Source/core/dom/shadow/ElementShadow.cpp
+++ b/Source/core/dom/shadow/ElementShadow.cpp
@@ -361,9 +361,9 @@ void ElementShadow::collectSelectFeatureSetFrom(ShadowRoot& root)
         if (!element->hasTagName(HTMLNames::contentTag))
             continue;
         const CSSSelectorList& list = toHTMLContentElement(element)->selectorList();
-        for (const CSSSelector* selector = list.first(); selector; selector = CSSSelectorList::next(selector)) {
+        for (const CSSSelector* selector = list.first(); selector; selector = CSSSelectorList::next(*selector)) {
             for (const CSSSelector* component = selector; component; component = component->tagHistory())
-                m_selectFeatures.collectFeaturesFromSelector(component);
+                m_selectFeatures.collectFeaturesFromSelector(*component);
         }
     }
 }