[turbofan] Better test for for-in/continue OSR problem.

test/mjsunit/compiler/regress-607493.js

 // Copyright 2016 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.
 
 // Flags: --allow-natives-syntax
 
-var a = [1];
+(function ForInTryCatchContrinueOsr() {
+  var a = [1];
 
-function g() {
-  for (var x in a) {
-    try {
-      for (var i = 0; i < 10; i++) { %OptimizeOsr(); }
-      return;
-    } catch(e) {
+  function g() {
+    for (var x in a) {
+      try {
+        for (var i = 0; i < 10; i++) { %OptimizeOsr(); }
+        return;
+      } catch(e) {
+        continue;
+      }
+    }
+  }
+
+  g();
+})();
+
+(function ForInContinueNestedOsr() {
+  var a = [1];
+
+  function g() {
+    for (var x in a) {
+      if (x) {
+        for (var i = 0; i < 10; i++) { %OptimizeOsr(); }
+      }
       continue;
     }
   }
-}
 
-g();
+  g();
+})();