Pass around CSSSelector by reference instead of pointer

Source/core/css/ElementRuleCollector.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 268 matching lines @@
         // We know this selector does not include any pseudo elements.
         if (m_pseudoStyleRequest.pseudoId != NOPSEUDO)
             return false;
         // We know a sufficiently simple single part selector matches simply because we found it from the rule hash.
         // This is limited to HTML only so we don't need to check the namespace.
         ASSERT(m_context.element());
         if (ruleData.hasRightmostSelectorMatchingHTMLBasedOnRuleHash() && m_context.element()->isHTMLElement()) {
             if (!ruleData.hasMultipartSelector())
                 return true;
         }
-        if (ruleData.selector()->m_match == CSSSelector::Tag && !SelectorChecker::tagMatches(*m_context.element(), ruleData.selector()->tagQName()))
+        if (ruleData.selector().m_match == CSSSelector::Tag && !SelectorChecker::tagMatches(*m_context.element(), ruleData.selector().tagQName()))
             return false;
         SelectorCheckerFastPath selectorCheckerFastPath(ruleData.selector(), *m_context.element());
         if (!selectorCheckerFastPath.matchesRightmostAttributeSelector())
             return false;
 
         return selectorCheckerFastPath.matches();
     }
 
     // Slow path.
     SelectorChecker selectorChecker(m_context.element()->document(), m_mode);
@@ skipping 100 matching lines @@
     // information about "scope".
     int firstRuleIndex = -1, lastRuleIndex = -1;
     RuleRange ruleRange(firstRuleIndex, lastRuleIndex);
     // FIXME: Verify whether it's ok to ignore CascadeScope here.
     collectMatchingRules(MatchRequest(ruleSet), ruleRange, SelectorChecker::StaysWithinTreeScope);
 
     return m_matchedRules && !m_matchedRules->isEmpty();
 }
 
 } // namespace WebCore