Pass around CSSSelector by reference instead of pointer

Source/core/dom/shadow/SelectRuleFeatureSet.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 34 matching lines @@
     m_cssRuleFeatureSet.add(featureSet.m_cssRuleFeatureSet);
     m_featureFlags |= featureSet.m_featureFlags;
 }
 
 void SelectRuleFeatureSet::clear()
 {
     m_cssRuleFeatureSet.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;
     case CSSSelector::PseudoEnabled:
         setSelectRuleFeature(AffectedSelectorEnabled);
         break;
     case CSSSelector::PseudoDisabled:
         setSelectRuleFeature(AffectedSelectorDisabled);
         break;
     case CSSSelector::PseudoIndeterminate:
         setSelectRuleFeature(AffectedSelectorIndeterminate);
         break;
     case CSSSelector::PseudoLink:
         setSelectRuleFeature(AffectedSelectorLink);
         break;
     case CSSSelector::PseudoTarget:
         setSelectRuleFeature(AffectedSelectorTarget);
         break;
     case CSSSelector::PseudoVisited:
         setSelectRuleFeature(AffectedSelectorVisited);
         break;
     default:
         break;
     }
 }
 
 }