[strong] Refactor ObjectStrength into a replacement for strong boolean args

src/json-parser.h

Index: src/json-parser.h
diff --git a/src/json-parser.h b/src/json-parser.h
index 76882dd5407b4ff8d0cfeae3af6697d1649e3740..18e19f15e1800932778909056047b903a768b29e 100644
--- a/src/json-parser.h
+++ b/src/json-parser.h
@@ -525,7 +525,7 @@ Handle<Object> JsonParser<seq_one_byte>::ParseJsonArray() {
     fast_elements->set(i, *elements[i]);
   }
   Handle<Object> json_array = factory()->NewJSArrayWithElements(
-      fast_elements, FAST_ELEMENTS, WEAK, pretenure_);
+      fast_elements, FAST_ELEMENTS, Strength::NORMAL, pretenure_);
   return scope.CloseAndEscape(json_array);
 }