Use macros instead of specializing VectorTraits explicitly

Source/core/css/CSSPropertySourceData.h

Index: Source/core/css/CSSPropertySourceData.h
diff --git a/Source/core/css/CSSPropertySourceData.h b/Source/core/css/CSSPropertySourceData.h
index a4c1ca80f509f7b03508b08acc840af7222800a5..021328e0c51fffbdbd31095b323f7fd8c7a86bfd 100644
--- a/Source/core/css/CSSPropertySourceData.h
+++ b/Source/core/css/CSSPropertySourceData.h
@@ -143,18 +143,7 @@ struct CSSRuleSourceData : public RefCountedWillBeGarbageCollected<CSSRuleSource
 
 } // namespace WebCore
 
-namespace WTF {
-
-template <> struct VectorTraits<WebCore::SourceRange> : VectorTraitsBase<WebCore::SourceRange> {
-    static const bool canInitializeWithMemset = true;
-    static const bool canMoveWithMemcpy = true;
-};
-
-template <> struct VectorTraits<WebCore::CSSPropertySourceData> : VectorTraitsBase<WebCore::CSSPropertySourceData> {
-    static const bool canInitializeWithMemset = true;
-    static const bool canMoveWithMemcpy = true;
-};
-
-}
+WTF_ALLOW_MOVE_AND_INIT_WITH_MEM_FUNCTIONS(WebCore::SourceRange);
+WTF_ALLOW_MOVE_AND_INIT_WITH_MEM_FUNCTIONS(WebCore::CSSPropertySourceData);
 
 #endif // CSSPropertySourceData_h