Remove execScript from V8. No longer present i neither Firefox nor Safari.

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index 8db736c732df02d29c3142d09033078165c54228..d22e94d85ee5416bfdab7d48ae5e23b469084858 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -148,17 +148,6 @@ function GlobalEval(x) {
 }
 
 
-// execScript for IE compatibility.
-function GlobalExecScript(expr, lang) {
-  // NOTE: We don't care about the character casing.
-  if (!lang || /javascript/i.test(lang)) {
-    var f = %CompileString(ToString(expr));
-    %_CallFunction(%GlobalReceiver(global), f);
-  }
-  return null;
-}
-
-
 // ----------------------------------------------------------------------------
 
 
@@ -178,8 +167,7 @@ function SetupGlobal() {
     "isFinite", GlobalIsFinite,
     "parseInt", GlobalParseInt,
     "parseFloat", GlobalParseFloat,
-    "eval", GlobalEval,
-    "execScript", GlobalExecScript
+    "eval", GlobalEval
   ));
 }