[builtins] Migrate Object.keys to CodeStubAssembler builtin.

src/bootstrapper.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 "src/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/ieee754.h"
 #include "src/code-stubs.h"
@@ skipping 1293 matching lines @@
 
     Handle<JSFunction> object_is_frozen = SimpleInstallFunction(
         object_function, "isFrozen", Builtins::kObjectIsFrozen, 1, false);
     native_context()->set_object_is_frozen(*object_is_frozen);
 
     Handle<JSFunction> object_is_sealed = SimpleInstallFunction(
         object_function, "isSealed", Builtins::kObjectIsSealed, 1, false);
     native_context()->set_object_is_sealed(*object_is_sealed);
 
     Handle<JSFunction> object_keys = SimpleInstallFunction(
-        object_function, "keys", Builtins::kObjectKeys, 1, false);
+        object_function, "keys", Builtins::kObjectKeys, 1, true);
     native_context()->set_object_keys(*object_keys);
     SimpleInstallFunction(object_function, factory->entries_string(),
                           Builtins::kObjectEntries, 1, false);
     SimpleInstallFunction(object_function, factory->values_string(),
                           Builtins::kObjectValues, 1, false);
 
     SimpleInstallFunction(isolate->initial_object_prototype(),
                           "__defineGetter__", Builtins::kObjectDefineGetter, 2,
                           true);
     SimpleInstallFunction(isolate->initial_object_prototype(),
@@ skipping 3958 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8