Allow eval in detached contexts

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index 7fb317db7e9e2860ab4cd5c6e53da54d4a4c3de5..bad0154b0ba0ba5bb7425a38cdd9aafb82783de6 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -163,16 +163,6 @@ function GlobalParseFloat(string) {
 function GlobalEval(x) {
   if (!IS_STRING(x)) return x;
 
-  // For consistency with JSC we require the global object passed to
-  // eval to be the global object from which 'eval' originated. This
-  // is not mandated by the spec.
-  // We only throw if the global has been detached, since we need the
-  // receiver as this-value for the call.
-  if (!%IsAttachedGlobal(global)) {
-    throw new $EvalError('The "this" value passed to eval must ' +
-                         'be the global object from which eval originated');
-  }
-
   var global_proxy = %GlobalProxy(global);
 
   var f = %CompileString(x, false, 0);