Return MaybeHandle from SetProperty.

src/factory.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "factory.h"
 
 #include "isolate-inl.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 793 matching lines @@
     ASSERT(object_function->has_initial_map());
     new_map = Map::Copy(handle(object_function->initial_map()));
   }
 
   Handle<JSObject> prototype = NewJSObjectFromMap(new_map);
 
   if (!function->shared()->is_generator()) {
     JSObject::SetLocalPropertyIgnoreAttributes(prototype,
                                                constructor_string(),
                                                function,
-                                               DONT_ENUM);
+                                               DONT_ENUM).Assert();
   }
 
   return prototype;
 }
 
 
 Handle<FixedArray> Factory::CopyFixedArray(Handle<FixedArray> array) {
   CALL_HEAP_FUNCTION(isolate(), array->Copy(), FixedArray);
 }
 
@@ skipping 1123 matching lines @@
   if (name->Equals(h->infinity_string())) return infinity_value();
   return Handle<Object>::null();
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 } }  // namespace v8::internal