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

test/mjsunit/object-seal.js

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 10 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Tests the Object.seal and Object.isSealed methods - ES 19.1.2.17 and
 // ES 19.1.2.13
 
-// Flags: --allow-natives-syntax --noalways-opt
+// Flags: --allow-natives-syntax --crankshaft --noalways-opt
 
 // Test that we return obj if non-object is passed as argument
 var non_objects = new Array(undefined, null, 1, -1, 0, 42.43, Symbol("test"));
 for (var key in non_objects) {
   assertSame(non_objects[key], Object.seal(non_objects[key]));
 }
 
 // Test that isFrozen always returns true for non-objects
 for (var key in non_objects) {
   assertTrue(Object.isSealed(non_objects[key]));
@@ skipping 340 matching lines @@
 assertTrue(%HasFastProperties(obj));
 Object.seal(obj);
 assertTrue(%HasFastProperties(obj));
 assertTrue(Object.isSealed(obj));
 
 function Sealed() {}
 Object.seal(Sealed);
 assertDoesNotThrow(function() { return new Sealed(); });
 Sealed.prototype.prototypeExists = true;
 assertTrue((new Sealed()).prototypeExists);