Built-in JSON support

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 54f2089f7466a35e366597c64d23a2e1fe683062..9fe084e117cd91e12713c30f135a88ee93a3c8f4 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -163,6 +163,10 @@ class Factory : public AllStatic {
 
   static Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
 
+  // Creates a copy of this function using a copy of the original
+  // function's shared function info.
+  static Handle<JSFunction> CopyFunctionDeep(Handle<JSFunction> fun);
+
   // Numbers (eg, literals) are pretenured by the parser.
   static Handle<Object> NewNumber(double value,
                                   PretenureFlag pretenure = NOT_TENURED);