Use macros instead of specializing VectorTraits explicitly

Source/core/css/ElementRuleCollector.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 67 matching lines @@
     // trace a raw rule data pointer at this point.
     const RuleData* m_ruleData;
     unsigned m_specificity;
     CascadeScope m_cascadeScope;
     uint64_t m_position;
     RawPtrWillBeMember<const CSSStyleSheet> m_parentStyleSheet;
 };
 
 } // namespace WebCore
 
-
-namespace WTF {
-
-template <> struct VectorTraits<WebCore::MatchedRule> : VectorTraitsBase<WebCore::MatchedRule> {
-    static const bool canInitializeWithMemset = true;
-    static const bool canMoveWithMemcpy = true;
-};
-
-} // namespace WTF
+WTF_ALLOW_MOVE_AND_INIT_WITH_MEM_FUNCTIONS(WebCore::MatchedRule);
 
 namespace WebCore {
 
 // FIXME: oilpan: when transition types are gone this class can be replaced with HeapVector.
 class StyleRuleList FINAL : public RefCountedWillBeGarbageCollected<StyleRuleList> {
 public:
     static PassRefPtrWillBeRawPtr<StyleRuleList> create() { return adoptRefWillBeNoop(new StyleRuleList()); }
 
     void trace(Visitor* visitor)
     {
@@ skipping 77 matching lines @@
 
     // Output.
     RefPtrWillBeMember<StaticCSSRuleList> m_cssRuleList;
     RefPtrWillBeMember<StyleRuleList> m_styleRuleList;
     MatchResult m_result;
 };
 
 } // namespace WebCore
 
 #endif // ElementRuleCollector_h