Set max new space size in tests to proper MB value.

test/mjsunit/math-floor-part3.js

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-// Flags: --allow-natives-syntax
+// Flags: --max-new-space-size=2 --allow-natives-syntax
 
 var test_id = 0;
 
 function testFloor(expect, input) {
   var test = new Function('n',
                           '"' + (test_id++) + '";return Math.floor(n)');
   assertEquals(expect, test(input));
   assertEquals(expect, test(input));
   assertEquals(expect, test(input));
   %OptimizeFunctionOnNextCall(test);
@@ skipping 39 matching lines @@
   testFloor(-two_52 + 1, -two_52 + 1 + 0.1);
   testFloor(-two_52 + 1, -two_52 + 1 + 0.5);
   testFloor(-two_52 + 1, -two_52 + 1 + 0.7);
 }
 
 
 // Test in a loop to cover the custom IC and GC-related issues.
 for (var i = 0; i < 100; i++) {
   test();
 }