Remove experimental flags that are now required

test/mjsunit/packed-elements.js

 // Copyright 2012 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.
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 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax --smi-only-arrays --packed-arrays
-
-var has_packed_elements = !%HasFastHoleyElements(Array());
+// Flags: --allow-natives-syntax
 
 function test1() {
   var a = Array(8);
   assertTrue(%HasFastSmiOrObjectElements(a));
   assertTrue(%HasFastHoleyElements(a));
 }
 
 function test2() {
   var a = Array();
   assertTrue(%HasFastSmiOrObjectElements(a));
@@ skipping 53 matching lines @@
 }
 
 function test_with_optimization(f) {
   // Run tests in a loop to make sure that inlined Array() constructor runs out
   // of new space memory and must fall back on runtime impl.
   for (i = 0; i < 25000; ++i) f();
   %OptimizeFunctionOnNextCall(f);
   for (i = 0; i < 25000; ++i) f(); // Make sure GC happens
 }
 
-if (has_packed_elements) {
-  test_with_optimization(test1);
-  test_with_optimization(test2);
-  test_with_optimization(test3);
-  test_with_optimization(test4);
-  test_with_optimization(test5);
-  test_with_optimization(test6);
-}
+test_with_optimization(test1);
+test_with_optimization(test2);
+test_with_optimization(test3);
+test_with_optimization(test4);
+test_with_optimization(test5);
+test_with_optimization(test6);