Expose JSON stringifier through V8 API

src/runtime/runtime-object.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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug/debug.h"
 #include "src/isolate-inl.h"
+#include "src/json-stringifier.h"
 #include "src/messages.h"
 #include "src/property-descriptor.h"
 #include "src/runtime/runtime.h"
 
 namespace v8 {
 namespace internal {
 
 MaybeHandle<Object> Runtime::GetObjectProperty(Isolate* isolate,
                                                Handle<Object> object,
                                                Handle<Object> key) {
@@ skipping 197 matching lines @@
   bool success = false;
   LookupIterator it =
       LookupIterator::PropertyOrElement(isolate, object, key, &success);
   if (!success) return MaybeHandle<Object>();
 
   MAYBE_RETURN_NULL(Object::SetProperty(&it, value, language_mode,
                                         Object::MAY_BE_STORE_FROM_KEYED));
   return value;
 }
 
+MaybeHandle<Object> Runtime::BasicJsonStringify(Isolate* isolate,
+                                                Handle<Object> object) {
+  return BasicJsonStringifier(isolate).Stringify(object);
+}
+
+MaybeHandle<Object> Runtime::BasicJsonStringifyString(Isolate* isolate,
+                                                      Handle<String> string) {
+  return BasicJsonStringifier::StringifyString(isolate, string);
+}
 
 RUNTIME_FUNCTION(Runtime_GetPrototype) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSReceiver, obj, 0);
   Handle<Object> prototype;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, prototype,
                                      JSReceiver::GetPrototype(isolate, obj));
   return *prototype;
 }
@@ skipping 1021 matching lines @@
   DCHECK(args.length() == 2);
   CONVERT_ARG_HANDLE_CHECKED(Object, o, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, properties, 1);
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, o, JSReceiver::DefineProperties(isolate, o, properties));
   return *o;
 }
 
 }  // namespace internal
 }  // namespace v8