Make the fuchsia mojo/public repo the source of truth.

mojo/public/c/tests/system/perftest_utils.h

-// Copyright 2016 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.
-
-#ifndef MOJO_PUBLIC_C_TESTS_SYSTEM_PERFTEST_UTILS_H_
-#define MOJO_PUBLIC_C_TESTS_SYSTEM_PERFTEST_UTILS_H_
-
-#include <mojo/system/time.h>
-
-#include <functional>
-
-namespace mojo {
-namespace test {
-
-// How long to run each perf test for (in microseconds).
-constexpr MojoTimeTicks kPerftestTimeMicroseconds = 3 * 1000000;
-
-// Iterates the given function for |kPerftestTimeMicroseconds| and reports the
-// number of iterations executed per second.
-void IterateAndReportPerf(const char* test_name,
-                          const char* sub_test_name,
-                          std::function<void()> single_iteration);
-
-// Sleeps for the given amount of time (in microseconds).
-void Sleep(MojoTimeTicks microseconds);
-
-}  // namespace test
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_C_TESTS_SYSTEM_PERFTEST_UTILS_H_