Revert "filter cross context eval"

src/v8natives.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file relies on the fact that the following declarations have been made
 // in runtime.js:
 // var $Object = global.Object;
 // var $Boolean = global.Boolean;
 // var $Number = global.Number;
 // var $Function = global.Function;
@@ skipping 1841 matching lines @@
   var body = (n > 0) ? ToString(arguments[n - 1]) : '';
   return '(' + function_token + '(' + p + ') {\n' + body + '\n})';
 }
 
 
 function FunctionConstructor(arg1) {  // length == 1
   var source = NewFunctionString(arguments, 'function');
   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;
 }
 
 
 // ----------------------------------------------------------------------------
 
 function SetUpFunction() {
   %CheckIsBootstrapping();
 
@@ skipping 30 matching lines @@
   }
   if (!IS_SPEC_FUNCTION(method)) {
     throw MakeTypeError('not_iterable', [obj]);
   }
   var iterator = %_CallFunction(obj, method);
   if (!IS_SPEC_OBJECT(iterator)) {
     throw MakeTypeError('not_an_iterator', [iterator]);
   }
   return iterator;
 }