EDK: Move ref counting classes to mojo/edk/util.

mojo/edk/system/ref_counted_perftest.cc

-// Copyright 2015 The Chromium 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 <stdint.h>
-
-#include "mojo/edk/system/ref_counted.h"
-#include "mojo/edk/system/test/perf_log.h"
-#include "mojo/edk/system/test/stopwatch.h"
-#include "mojo/edk/system/test/timeouts.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace mojo {
-namespace system {
-namespace {
-
-class MyClass : public RefCountedThreadSafe<MyClass> {
- public:
-  static RefPtr<MyClass> Create() {
-    return RefPtr<MyClass>(AdoptRef(new MyClass()));
-  }
-
- private:
-  friend class RefCountedThreadSafe<MyClass>;
-
-  MyClass() {}
-  ~MyClass() {}
-};
-
-TEST(RefCountedPerfTest, OneThreadCreateAdoptDestroy) {
-  uint64_t iterations = 0;
-  test::Stopwatch stopwatch;
-  stopwatch.Start();
-  do {
-    for (size_t i = 0; i < 1000; i++, iterations++) {
-      RefPtr<MyClass> x = MyClass::Create();
-      x = nullptr;
-    }
-    iterations++;
-  } while (stopwatch.Elapsed() < test::DeadlineFromMilliseconds(1000));
-  double elapsed = stopwatch.Elapsed() / 1000000.0;
-
-  test::LogPerfResult("OneThreadCreateAdoptDestroy", iterations / elapsed,
-                      "iterations/s");
-}
-
-TEST(RefCountedPerfTest, OneThreadAssignRefPtr) {
-  RefPtr<MyClass> x = MyClass::Create();
-  uint64_t iterations = 0;
-  test::Stopwatch stopwatch;
-  stopwatch.Start();
-  do {
-    for (size_t i = 0; i < 1000; i++, iterations++) {
-      RefPtr<MyClass> y = x;
-    }
-    iterations++;
-  } while (stopwatch.Elapsed() < test::DeadlineFromMilliseconds(1000));
-  double elapsed = stopwatch.Elapsed() / 1000000.0;
-
-  test::LogPerfResult("OneThreadAssignRefPtr", iterations / elapsed,
-                      "iterations/s");
-}
-
-// TODO(vtl): Add threaded perf tests.
-
-}  // namespace
-}  // namespace system
-}  // namespace mojo