Expose JSON stringifier through V8 API

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 4377f1a6b366d4f8ac3c1401d71a8a4da2c60d5e..075c267944f19963d5bb22348b12acf9d176e3f0 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -49,12 +49,12 @@
 #include "src/profiler/heap-snapshot-generator-inl.h"
 #include "src/profiler/profile-generator-inl.h"
 #include "src/profiler/sampler.h"
-#include "src/property.h"
 #include "src/property-descriptor.h"
 #include "src/property-details.h"
+#include "src/property.h"
 #include "src/prototype.h"
-#include "src/runtime/runtime.h"
 #include "src/runtime-profiler.h"
+#include "src/runtime/runtime.h"
 #include "src/simulator.h"
 #include "src/snapshot/natives.h"
 #include "src/snapshot/snapshot.h"
@@ -66,7 +66,6 @@
 #include "src/version.h"
 #include "src/vm-state-inl.h"
 
-
 namespace v8 {
 
 #define LOG_API(isolate, expr) LOG(isolate, ApiEntryCall(expr))
@@ -2752,6 +2751,21 @@ Local<Value> JSON::Parse(Local<String> json_string) {
   RETURN_TO_LOCAL_UNCHECKED(Parse(isolate, json_string), Value);
 }
 
+MaybeLocal<String> JSON::Stringify(Isolate* v8_isolate,
+                                   Local<Object> json_object) {
+  auto isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
+  PREPARE_FOR_EXECUTION_WITH_ISOLATE(isolate, "JSON::Stringify", String);
+  i::Handle<i::Object> object = Utils::OpenHandle(*json_object);
+  i::Handle<i::Object> maybe;
+  has_pending_exception =
+      !i::Runtime::BasicJsonStringify(isolate, object).ToHandle(&maybe);
+  RETURN_ON_FAILED_EXECUTION(String);
+  Local<String> result;
+  has_pending_exception =
+      !ToLocal<String>(i::Object::ToString(isolate, maybe), &result);
+  RETURN_ON_FAILED_EXECUTION(String);
+  RETURN_ESCAPED(result);
+}
 
 // --- D a t a ---