Reland: Use simple/fast inline function version of MinMax in JS

test/mjsunit/minmax-simple.js

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --expose-natives-as natives
+// Test the MaxSimple and MinSimple internal methods in runtime.js
+
+var MaxSimple = natives.ImportNow("MaxSimple");
+var MinSimple = natives.ImportNow("MinSimple");
+
+function checkEvaluations(target) {
+  var evaluations = 0;
+  var observedNumber = {
+    valueOf: function() {
+      evaluations++;
+      return 0;
+    }
+  };
+  target(observedNumber, observedNumber);
+  return evaluations;
+}
+
+assertEquals(1, MaxSimple(-1, 1));
+assertEquals(2, checkEvaluations(MaxSimple));
+
+assertEquals(-1, MinSimple(-1, 1));
+assertEquals(2, checkEvaluations(MinSimple));