[tests] Make assertOptimized()/assertUnoptimized() great again.

test/mjsunit/regress/regress-v8-5697.js

Index: test/mjsunit/regress/regress-v8-5697.js
diff --git a/test/mjsunit/regress/regress-v8-5697.js b/test/mjsunit/regress/regress-v8-5697.js
index ba812271b49ec2e08a807b11b629b52cb415ed5e..550bd98017986a6f0c64d6d9be78727f41be27c2 100644
--- a/test/mjsunit/regress/regress-v8-5697.js
+++ b/test/mjsunit/regress/regress-v8-5697.js
@@ -9,6 +9,7 @@ function load(o) { return o.x; }
 for (var x = 0; x < 1000; ++x) {
   load({x});
   load({x});
+  %OptimizeFunctionOnNextCall(load);
   try { load(); } catch (e) { }
 }
 
@@ -20,6 +21,7 @@ function store(o) { o.x = -1; }
 for (var x = 0; x < 1000; ++x) {
   store({x});
   store({x});
+  %OptimizeFunctionOnNextCall(store);
   try { store(); } catch (e) { }
 }