[runtime] Support Proxy setPrototypeOf trap

src/runtime/runtime-object.cc

Index: src/runtime/runtime-object.cc
diff --git a/src/runtime/runtime-object.cc b/src/runtime/runtime-object.cc
index 707b05e57b756ccffc0b9ba422b0f2c0b1fde14a..f75f02e92b0d3dd3d094179413e16e868464cb16 100644
--- a/src/runtime/runtime-object.cc
+++ b/src/runtime/runtime-object.cc
@@ -182,9 +182,14 @@ RUNTIME_FUNCTION(Runtime_SetPrototype) {
   DCHECK(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, obj, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, prototype, 1);
-  MAYBE_RETURN(
-      JSReceiver::SetPrototype(obj, prototype, true, Object::THROW_ON_ERROR),
-      isolate->heap()->exception());
+
+  Maybe<bool> status =
+      JSReceiver::SetPrototype(obj, prototype, true, Object::THROW_ON_ERROR);
+  if (status.IsNothing()) return isolate->heap()->exception();
+  if (!status.FromJust()) {
+    THROW_NEW_ERROR_RETURN_FAILURE(
+        isolate, NewTypeError(MessageTemplate::kProxyHandlerNonObject));
+  }
   return *obj;
 }