src: replace deprecated SetWeak in object_wrap

Migrate node_object_wrap.h to the new SetWeak API.

PR-URL: https://github.com/nodejs/node/pull/5494
Reviewed-By: bnoordhuis - Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: targos - Michaël Zasso <mic.besace@gmail.com>

src/node_object_wrap.h

@@ -61,7 +61,7 @@ class ObjectWrap {
 
 
   inline void MakeWeak(void) {
-    persistent().SetWeak(this, WeakCallback);
+    persistent().SetWeak(this, WeakCallback, v8::WeakCallbackType::kParameter);
     persistent().MarkIndependent();
   }
 
@@ -96,14 +96,9 @@ class ObjectWrap {
 
  private:
   static void WeakCallback(
-      const v8::WeakCallbackData<v8::Object, ObjectWrap>& data) {
-    v8::Isolate* isolate = data.GetIsolate();
-    v8::HandleScope scope(isolate);
+      const v8::WeakCallbackInfo<ObjectWrap>& data) {
     ObjectWrap* wrap = data.GetParameter();
     assert(wrap->refs_ == 0);
-    assert(wrap->handle_.IsNearDeath());
-    assert(
-        data.GetValue() == v8::Local<v8::Object>::New(isolate, wrap->handle_));
     wrap->handle_.Reset();
     delete wrap;
   }