Reimplement a simpler version of JSON.stringify.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 19d9a3f0be9936a97b6c1370a50a17efa65374dd..b0a6b5e81427e1588a89f1c269a2b1e90c78f98b 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -46,6 +46,7 @@
 #include "isolate-inl.h"
 #include "jsregexp.h"
 #include "json-parser.h"
+#include "json-stringifier.h"
 #include "liveedit.h"
 #include "liveobjectlist-inl.h"
 #include "misc-intrinsics.h"
@@ -5760,6 +5761,14 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_QuoteJSONStringArray) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_BasicJSONStringify) {
+  ASSERT(args.length() == 1);
+  HandleScope scope(isolate);
+  BasicJsonStringifier stringifier(isolate);
+  return stringifier.Stringify(Handle<Object>(args[0]));
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_StringParseInt) {
   NoHandleAllocation ha;