[turbofan] Add checked load/store operators.

test/unittests/test-utils.cc

 // Copyright 2014 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.
 
 #include "test/unittests/test-utils.h"
 
 #include "src/base/platform/time.h"
 #include "src/flags.h"
 #include "src/isolate-inl.h"
 
@@ skipping 80 matching lines @@
 
 
 namespace internal {
 
 TestWithIsolate::~TestWithIsolate() {}
 
 
 Factory* TestWithIsolate::factory() const { return isolate()->factory(); }
 
 
+base::RandomNumberGenerator* TestWithIsolate::random_number_generator() const {
+  return isolate()->random_number_generator();
+}
+
+
 TestWithZone::~TestWithZone() {}
 
 }  // namespace internal
 }  // namespace v8