Remove now-unnecessary VectorTraits specializations.

Source/wtf/VectorTraits.h

 /*
  * Copyright (C) 2006, 2007, 2008 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef WTF_VectorTraits_h
 #define WTF_VectorTraits_h
 
 #include "wtf/OwnPtr.h"
 #include "wtf/RefPtr.h"
 #include "wtf/TypeTraits.h"
+#include <type_traits>
 #include <utility>
 
 using std::pair;
 
 namespace WTF {
 
     class AtomicString;
 
     template<typename T>
     struct VectorTraitsBase
     {
-        static const bool needsDestruction = !IsPod<T>::value;
-        static const bool canInitializeWithMemset = IsPod<T>::value;
-        static const bool canMoveWithMemcpy = IsPod<T>::value;
-        static const bool canCopyWithMemcpy = IsPod<T>::value;
-        static const bool canFillWithMemset = IsPod<T>::value && (sizeof(T) == sizeof(char));
-        static const bool canCompareWithMemcmp = IsPod<T>::value;
+        static const bool needsDestruction = !std::is_trivially_destructible<T>::value;
+        static const bool canInitializeWithMemset = std::is_pod<T>::value;
+        static const bool canMoveWithMemcpy = std::is_pod<T>::value;
+        static const bool canCopyWithMemcpy = std::is_pod<T>::value;
+        static const bool canFillWithMemset = std::is_pod<T>::value && (sizeof(T) == sizeof(char));
+        static const bool canCompareWithMemcmp = std::is_pod<T>::value;
         template<typename U = void>
         struct NeedsTracingLazily {
             static const bool value = NeedsTracing<T>::value;
         };
         static const WeakHandlingFlag weakHandlingFlag = NoWeakHandlingInCollections; // We don't support weak handling in vectors.
     };
 
     template<typename T>
     struct VectorTraits : VectorTraitsBase<T> { };
 
@@ skipping 60 matching lines @@
     struct VectorTraits<ClassName> : VectorTraitsBase<ClassName> \
     { \
         static const bool canInitializeWithMemset = true; \
     }; \
 }
 
 using WTF::VectorTraits;
 using WTF::SimpleClassVectorTraits;
 
 #endif // WTF_VectorTraits_h