Correctly hook up materialized receiver into the evaluation context chain.

test/mjsunit/regress/regress-crbug-491943.js

Index: test/mjsunit/regress/regress-crbug-491943.js
diff --git a/test/mjsunit/regress/regress-crbug-487289.js b/test/mjsunit/regress/regress-crbug-491943.js
similarity index 83%
copy from test/mjsunit/regress/regress-crbug-487289.js
copy to test/mjsunit/regress/regress-crbug-491943.js
index dbfb4041ca93465fcf579e2af52f6fd9f41d5481..c87d1301b7de16b148ad5a83cfff7dd28c55ce41 100644
--- a/test/mjsunit/regress/regress-crbug-487289.js
+++ b/test/mjsunit/regress/regress-crbug-491943.js
@@ -12,7 +12,12 @@ Debug.setListener(function(event, exec_state, event_data, data) {
   receiver = exec_state.frame(0).evaluate('this').value();
 });
 
-function f() { debugger; }
+
+function f() {
+  var context_local = 1;
+  (function() { return context_local; })();
+  debugger;
+}
 
 var expected = {};
 f.call(expected);