Create libsampler as V8 sampler library.

src/libsampler/utils.h

 // Copyright 2016 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: --allow-natives-syntax
+#ifndef V8_LIBSAMPLER_UTILS_H_
+#define V8_LIBSAMPLER_UTILS_H_
 
-(function() {
-  'use strict';
-  class A extends Function {
-    constructor(...args) {
-      super(...args);
-      this.a = 42;
-    }
+#include "include/v8.h"
+
+namespace v8 {
+namespace sampler {
+
+class Malloced {
+ public:
+  static void* New(size_t size) {
+    return malloc(size);
   }
-  var v1 = new A("'use strict';");
-  function f(func) {
-    func.__defineSetter__('a', function() { });
+
+  static void Delete(void* p) {
+    free(p);
   }
-  var v2 = new A();
-  f(v2);
-  f(v1);
-})();
+};
+
+}  // namespace sampler
+}  // namespace v8
+
+#endif  // V8_LIBSAMPLER_UTILS_H_