Upgrade Number constructor to ES6.

test/mjsunit/math-floor-part1.js

 // Copyright 2011 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 42 matching lines @@
   assertEquals(-Infinity, ifloor(-0));
   assertEquals(-Infinity, ifloor(-0));
   assertEquals(-Infinity, ifloor(-0));
   %OptimizeFunctionOnNextCall(ifloor);
   assertEquals(-Infinity, ifloor(-0));
 
   testFloor(0, 0.1);
   testFloor(0, 0.49999999999999994);
   testFloor(0, 0.5);
   testFloor(0, 0.7);
+  testFloor(0, 1.0 - Number.EPSILON);
   testFloor(-1, -0.1);
   testFloor(-1, -0.49999999999999994);
   testFloor(-1, -0.5);
   testFloor(-1, -0.7);
   testFloor(1, 1);
   testFloor(1, 1.1);
+  testFloor(1, 1.0 + Number.EPSILON);
   testFloor(1, 1.5);
   testFloor(1, 1.7);
   testFloor(-1, -1);
+  testFloor(-1, -1 + Number.EPSILON);
+  testFloor(-2, -1 - Number.EPSILON);
   testFloor(-2, -1.1);
   testFloor(-2, -1.5);
   testFloor(-2, -1.7);
 
   testFloor(0, Number.MIN_VALUE);
   testFloor(-1, -Number.MIN_VALUE);
   testFloor(Number.MAX_VALUE, Number.MAX_VALUE);
   testFloor(-Number.MAX_VALUE, -Number.MAX_VALUE);
   testFloor(Infinity, Infinity);
   testFloor(-Infinity, -Infinity);
 }
 
 
 // Test in a loop to cover the custom IC and GC-related issues.
 for (var i = 0; i < 10; i++) {
   test();
   new Array(i * 10000);
 }