[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 5a88614b1355466e36839a3b7a72ee94b18d3897..f1746e2ca274f1758229ef31c7b8d1209542fbfe 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) { }
 }