Oilpan: Avoid declaring a destructor for garbage collected ListHashSet.

Source/wtf/ListHashSet.h

Index: Source/wtf/ListHashSet.h
diff --git a/Source/wtf/ListHashSet.h b/Source/wtf/ListHashSet.h
index 12b83451ee425228c4dcd4541920936e131c0f8f..34ec3517b1ef0b3fbb785016e5a5c5f827d4d4d3 100644
--- a/Source/wtf/ListHashSet.h
+++ b/Source/wtf/ListHashSet.h
@@ -59,7 +59,8 @@ namespace WTF {
     // Note that for a ListHashSet you cannot specify the HashTraits as a
     // template argument. It uses the default hash traits for the ValueArg
     // type.
-    template<typename ValueArg, size_t inlineCapacity = 256, typename HashArg = typename DefaultHash<ValueArg>::Hash, typename AllocatorArg = ListHashSetAllocator<ValueArg, inlineCapacity> > class ListHashSet {
+    template<typename ValueArg, size_t inlineCapacity = 256, typename HashArg = typename DefaultHash<ValueArg>::Hash, typename AllocatorArg = ListHashSetAllocator<ValueArg, inlineCapacity> > class ListHashSet
+        : public HashTableDestructorBase<ListHashSet<ValueArg, inlineCapacity, HashArg, AllocatorArg>, AllocatorArg::isGarbageCollected> {
         typedef AllocatorArg Allocator;
         WTF_USE_ALLOCATOR(ListHashSet, Allocator);
 
@@ -98,7 +99,7 @@ namespace WTF {
         ListHashSet();
         ListHashSet(const ListHashSet&);
         ListHashSet& operator=(const ListHashSet&);
-        ~ListHashSet();
+        void finalize();
 
         void swap(ListHashSet&);
 
@@ -673,10 +674,10 @@ namespace WTF {
     }
 
     template<typename T, size_t inlineCapacity, typename U, typename V>
-    inline ListHashSet<T, inlineCapacity, U, V>::~ListHashSet()
+    inline void ListHashSet<T, inlineCapacity, U, V>::finalize()
     {
-        if (!Allocator::isGarbageCollected)
-            deleteAllNodes();
+        ASSERT(!Allocator::isGarbageCollected);
+        deleteAllNodes();
     }
 
     template<typename T, size_t inlineCapacity, typename U, typename V>