Revert "filter cross context eval"

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index 8614dc8aedbe5e368d5a285e8b1f7404ede2dadc..782b953ea9763edf0dadbc32511d32a6deef0463 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -1859,9 +1859,7 @@ function FunctionConstructor(arg1) {  // length == 1
   var global_proxy = %GlobalProxy(global);
   // Compile the string in the constructor and not a helper so that errors
   // appear to come from here.
-  var f = %CompileString(source, true);
-  if (!IS_FUNCTION(f)) return f;
-  f = %_CallFunction(global_proxy, f);
+  var f = %_CallFunction(global_proxy, %CompileString(source, true));
   %FunctionMarkNameShouldPrintAsAnonymous(f);
   return f;
 }