[tests] Cleanup tests that use assertOptimized()/assertUnoptimized().

test/mjsunit/regress/regress-map-invalidation-2.js

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-// Flags: --allow-natives-syntax
+// Flags: --allow-natives-syntax --crankshaft
 
 var c = { x: 2, y: 1 };
 
 function g() {
   var outer = { foo: 1 };
   function f(b, c) {
     var n = outer.foo;
     for (var i = 0; i < 10; i++) {
       n += c.x + outer.foo;
     }
     if (b) return [{ x: 1.5, y: 1 }];
     else return c;
   }
   // Clear type feedback from previous stress runs.
   %ClearFunctionTypeFeedback(f);
   return f;
 }
 
 var fun = g();
 fun(false, c);
 fun(false, c);
 fun(false, c);
 %OptimizeFunctionOnNextCall(fun);
 fun(false, c);
 fun(true, c);
 assertOptimized(fun);