[json] support replacer function in BasicJsonStringifier.

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index 122999607b6d649e5a9034b294d1ff09824d7aa8..1abf1ea1f02ebfb69724568c666e69469f420aa9 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -18,6 +18,7 @@
 #include "src/ic/handler-compiler.h"
 #include "src/ic/ic.h"
 #include "src/isolate-inl.h"
+#include "src/json-stringifier.h"
 #include "src/messages.h"
 #include "src/profiler/cpu-profiler.h"
 #include "src/property-descriptor.h"
@@ -2179,6 +2180,15 @@ BUILTIN(GlobalEval) {
       Execution::Call(isolate, function, target_global_proxy, 0, nullptr));
 }
 
+// ES6 section 24.3.2 JSON.stringify.
+BUILTIN(JsonStringify) {
+  HandleScope scope(isolate);
+  JsonStringifier stringifier(isolate);
+  RETURN_RESULT_OR_FAILURE(
+      isolate, stringifier.Stringify(args.atOrUndefined(isolate, 1),
+                                     args.atOrUndefined(isolate, 2),
+                                     args.atOrUndefined(isolate, 3)));

[Camillo Bruni, 2016/05/24 18:24:55]

nit: would you mind fetching the arguments into separate variables first?

+}
 
 // -----------------------------------------------------------------------------
 // ES6 section 20.2.2 Function Properties of the Math Object