[builtins] Migrate Object.keys to C++.

src/contexts.h

 // Copyright 2012 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.
 
 #ifndef V8_CONTEXTS_H_
 #define V8_CONTEXTS_H_
 
 #include "src/heap/heap.h"
 #include "src/objects.h"
 
@@ skipping 69 matching lines @@
 #define NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V)                             \
   V(IS_ARRAYLIKE, JSFunction, is_arraylike)                               \
   V(CONCAT_ITERABLE_TO_ARRAY_INDEX, JSFunction, concat_iterable_to_array) \
   V(GET_TEMPLATE_CALL_SITE_INDEX, JSFunction, get_template_call_site)     \
   V(MAKE_RANGE_ERROR_INDEX, JSFunction, make_range_error)                 \
   V(MAKE_TYPE_ERROR_INDEX, JSFunction, make_type_error)                   \
   V(OBJECT_FREEZE, JSFunction, object_freeze)                             \
   V(OBJECT_IS_EXTENSIBLE, JSFunction, object_is_extensible)               \
   V(OBJECT_IS_FROZEN, JSFunction, object_is_frozen)                       \
   V(OBJECT_IS_SEALED, JSFunction, object_is_sealed)                       \
+  V(OBJECT_KEYS, JSFunction, object_keys)                                 \
   V(REFLECT_APPLY_INDEX, JSFunction, reflect_apply)                       \
   V(REFLECT_CONSTRUCT_INDEX, JSFunction, reflect_construct)               \
   V(REFLECT_DEFINE_PROPERTY_INDEX, JSFunction, reflect_define_property)   \
   V(REFLECT_DELETE_PROPERTY_INDEX, JSFunction, reflect_delete_property)   \
   V(SPREAD_ARGUMENTS_INDEX, JSFunction, spread_arguments)                 \
   V(SPREAD_ITERABLE_INDEX, JSFunction, spread_iterable)
 
 
 #define NATIVE_CONTEXT_JS_BUILTINS(V)                   \
   V(CONCAT_ITERABLE_TO_ARRAY_BUILTIN_INDEX, JSFunction, \
@@ skipping 491 matching lines @@
 #endif
 
   STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize);
   STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CONTEXTS_H_