Expose JSON stringifier through V8 API

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index bc6edf5cea8ab4bb2d64e7716c8a8ddbb0fcd133..80e1c9fc3f8f3fa5d6e2ab6b8a1e943f40193efb 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -1665,9 +1665,8 @@ struct SampleInfo {
   StateTag vm_state;
 };
 
-
 /**
- * A JSON Parser.
+ * A JSON Parser and Stringifier.
  */
 class V8_EXPORT JSON {
  public:
@@ -1678,10 +1677,23 @@ class V8_EXPORT JSON {
    * \param json_string The string to parse.
    * \return The corresponding value if successfully parsed.
    */
-  static V8_DEPRECATED("Use maybe version",
+  static V8_DEPRECATED("Use the maybe version taking context",
                        Local<Value> Parse(Local<String> json_string));
+  static V8_DEPRECATE_SOON("Use the maybe version taking context",
+                           MaybeLocal<Value> Parse(Isolate* isolate,
+                                                   Local<String> json_string));
   static V8_WARN_UNUSED_RESULT MaybeLocal<Value> Parse(
-      Isolate* isolate, Local<String> json_string);
+      Local<Context> context, 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(
+      Local<Context> context, Local<Object> json_object);
 };