Mojo: Move public/tests/test_{support,utils}.* to public/{c,cpp}/test_support.

mojo/public/tests/test_support.h

-// Copyright 2014 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_TESTS_TEST_SUPPORT_H_
-#define MOJO_PUBLIC_TESTS_TEST_SUPPORT_H_
-
-// Note: This header should be compilable as C.
-
-#include "mojo/public/tests/test_support_export.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-MOJO_TEST_SUPPORT_EXPORT void MojoTestSupportLogPerfResult(
-    const char* test_name,
-    double value,
-    const char* units);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif
-
-#ifdef __cplusplus
-namespace mojo {
-namespace test {
-
-inline void LogPerfResult(const char* test_name,
-                          double value,
-                          const char* units) {
-  MojoTestSupportLogPerfResult(test_name, value, units);
-}
-
-}  // namespace test
-}  // namespace mojo
-#endif  // __cplusplus
-
-#endif  // MOJO_PUBLIC_TESTS_TEST_SUPPORT_H_