Ensure proper finalization of garbage-collected types.

Source/heap/Handle.h

Index: Source/heap/Handle.h
diff --git a/Source/heap/Handle.h b/Source/heap/Handle.h
index 892123a75418d4a6a3f5118c984cb80d9a3e5110..2df56dd4cdc9545165576a1faff971663c156b2d 100644
--- a/Source/heap/Handle.h
+++ b/Source/heap/Handle.h
@@ -683,6 +683,9 @@ template<typename T> PassOwnPtrWillBeRawPtr<T> adoptPtrWillBeNoop(T* ptr)
 }
 
 #define WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED // do nothing when oilpan is enabled.
+#define DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(type) // do nothing
+#define DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(type) // do nothing
+#define DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(type) // do nothing
 
 #else // !ENABLE(OILPAN)
 
@@ -729,6 +732,17 @@ template<typename T> PassRefPtrWillBeRawPtr<T> adoptRefWillBeRefCountedGarbageCo
 template<typename T> PassOwnPtrWillBeRawPtr<T> adoptPtrWillBeNoop(T* ptr) { return adoptPtr(ptr); }
 
 #define WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED WTF_MAKE_FAST_ALLOCATED
+#define DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(type) \
+    public:                                            \
+        ~type();                                       \
+    private:
+#define DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(type) \
+    public:                                                    \
+        virtual ~type();                                       \
+    private:
+
+#define DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(type) \
+    type::~type() { }
 
 #endif // ENABLE(OILPAN)