- Remove obsolete random number generator from the VM code.

runtime/vm/random.cc

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-#include "vm/random.h"
-
-#include "platform/assert.h"
-#include "vm/isolate.h"
-
-namespace dart {
-
-// LSFR step with a period of 31-bits.
-// Based on http://en.wikipedia.org/wiki/Linear_feedback_shift_register
-static int32_t LinearFeedbackShiftRegisterStep(int32_t seed) {
-  return (seed >> 1) ^ ((-(seed & 1)) & (1 << 30 | 1 << 27));
-}
-
-
-int32_t Random::RandomInt32() {
-  Isolate* isolate = Isolate::Current();
-  ASSERT(isolate != NULL);
-  int32_t result = isolate->random_seed();
-  int32_t new_random_seed = LinearFeedbackShiftRegisterStep(result);
-  isolate->set_random_seed(new_random_seed);
-  return result;
-}
-
-}  // namespace dart