Fix regression in JSON serialization of RegExps.

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index 8e057037e4cf08c9ef5f46ef9a225b44d9064b88..4a1fd35cb9f20bf35628b05baf1442955a731be0 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -909,19 +909,13 @@ function BooleanValueOf() {
 }
 
 
-function BooleanToJSON(key) {
-  return CheckJSONPrimitive(this.valueOf());
-}
-
-
 // ----------------------------------------------------------------------------
 
 
 function SetupBoolean() {
   InstallFunctions($Boolean.prototype, DONT_ENUM, $Array(
     "toString", BooleanToString,
-    "valueOf", BooleanValueOf,
-    "toJSON", BooleanToJSON
+    "valueOf", BooleanValueOf
   ));
 }
 
@@ -1021,18 +1015,6 @@ function NumberToPrecision(precision) {
 }
 
 
-function CheckJSONPrimitive(val) {
-  if (!IsPrimitive(val))
-    throw MakeTypeError('result_not_primitive', ['toJSON', val]);
-  return val;
-}
-
-
-function NumberToJSON(key) {
-  return CheckJSONPrimitive(this.valueOf());
-}
-
-
 // ----------------------------------------------------------------------------
 
 function SetupNumber() {
@@ -1073,15 +1055,13 @@ function SetupNumber() {
     "valueOf", NumberValueOf,
     "toFixed", NumberToFixed,
     "toExponential", NumberToExponential,
-    "toPrecision", NumberToPrecision,
-    "toJSON", NumberToJSON
+    "toPrecision", NumberToPrecision
   ));
 }
 
 SetupNumber();
 
 
-
 // ----------------------------------------------------------------------------
 // Function