Expose JSON stringifier through V8 API

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index ef311d347054afb255d581a795e2f424c78ac17b..bd1dc32c9ad39b5011565a4e1652fd58fae2460e 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -1680,6 +1680,16 @@ class V8_EXPORT JSON {
                        Local<Value> Parse(Local<String> json_string));
   static V8_WARN_UNUSED_RESULT MaybeLocal<Value> Parse(
       Isolate* isolate, Local<String> json_string);
+
+  /**
+   * Tries to stringify the JSON-serializable object |json_object| and returns
+   * it as string if successful.
+   *
+   * \param json_object The JSON-serializable object to stringify.
+   * \return The corresponding string if successfully stringified.
+   */
+  static V8_WARN_UNUSED_RESULT MaybeLocal<String> Stringify(
+      Isolate* isolate, Local<Object> json_object);

[Toon Verwaest, 2016/04/04 10:43:39]

Shouldn't this get the context as input, like v8::Object::Get? Probably the same
for Parse above.

[Yang, 2016/04/04 10:55:43]

The parser should definitely get a context as argument since the object it
creates is context-specific.

Not so sure about the stringifier though, as the returned string is
context-independent. But we probably do want access checks during stringifying
to check for the correct context?

 };