[runtime] Unify the ToObject handling.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index a3c52adc590a206f4323ecda1791cad3ad1e5146..29df33c414d7310b2ccc318505712649415d4876 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1135,8 +1135,8 @@ class Object {
 
   // Convert to a JSObject if needed.
   // native_context is used when creating wrapper object.
-  static inline MaybeHandle<JSReceiver> ToObject(Isolate* isolate,
-                                                 Handle<Object> object);
+  MUST_USE_RESULT static inline MaybeHandle<JSReceiver> ToObject(
+      Isolate* isolate, Handle<Object> object);
   MUST_USE_RESULT static MaybeHandle<JSReceiver> ToObject(
       Isolate* isolate, Handle<Object> object, Handle<Context> context);