[intrinsics] Remove obsolete intrinsics.

src/builtins.cc

 // 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.
 
 #include "src/builtins.h"
 
 #include "src/api-arguments.h"
 #include "src/api-natives.h"
 #include "src/api.h"
 #include "src/base/ieee754.h"
@@ skipping 4976 matching lines @@
   // Do not lazily compute eval position for AsyncFunction, as they may not be
   // determined after the function is resumed.
   Handle<JSFunction> func = Handle<JSFunction>::cast(maybe_func);
   Handle<Script> script = handle(Script::cast(func->shared()->script()));
   int position = script->GetEvalPosition();
   USE(position);
 
   return *func;
 }
 
-// ES6 19.1.3.6 Object.prototype.toString
+// -----------------------------------------------------------------------------
+// ES6 section 19.1 Object Objects
+
+// ES6 section 19.1.3.4 Object.prototype.propertyIsEnumerable ( V )
+BUILTIN(ObjectPrototypePropertyIsEnumerable) {
+  HandleScope scope(isolate);
+  Handle<JSReceiver> object;
+  Handle<Name> name;
+  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+      isolate, name, Object::ToName(isolate, args.atOrUndefined(isolate, 1)));
+  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+      isolate, object, JSReceiver::ToObject(isolate, args.receiver()));
+  Maybe<PropertyAttributes> maybe =
+      JSReceiver::GetOwnPropertyAttributes(object, name);
+  if (!maybe.IsJust()) return isolate->heap()->exception();
+  if (maybe.FromJust() == ABSENT) return isolate->heap()->false_value();
+  return isolate->heap()->ToBoolean((maybe.FromJust() & DONT_ENUM) == 0);
+}
+
+// ES6 section 19.1.3.6 Object.prototype.toString
 BUILTIN(ObjectProtoToString) {
   HandleScope scope(isolate);
   Handle<Object> object = args.at<Object>(0);
   RETURN_RESULT_OR_FAILURE(isolate,
                            Object::ObjectProtoToString(isolate, object));
 }
 
 // -----------------------------------------------------------------------------
 // ES6 section 19.4 Symbol Objects
 
@@ skipping 1740 matching lines @@
 BUILTIN_LIST_H(DEFINE_BUILTIN_ACCESSOR_H)
 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A)
 #undef DEFINE_BUILTIN_ACCESSOR_C
 #undef DEFINE_BUILTIN_ACCESSOR_A
 #undef DEFINE_BUILTIN_ACCESSOR_T
 #undef DEFINE_BUILTIN_ACCESSOR_S
 #undef DEFINE_BUILTIN_ACCESSOR_H
 
 }  // namespace internal
 }  // namespace v8