Fix test after r18586

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/138063003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18588 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/regress/regress-map-invalidation-1.js

@@ -30,7 +30,7 @@
 var c = { x: 2, y: 1 };
 
 function h() {
-  %MigrateInstance(c);
+  %TryMigrateInstance(c);
   return 2;
 }
 %NeverOptimizeFunction(h);