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

mojo/public/c/system/tests/core_perftest.cc

 // Copyright 2013 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.
 
 // This tests the performance of the C API.
 
 #include "mojo/public/c/system/core.h"
 
 #include <assert.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
 
 #include "mojo/public/cpp/system/macros.h"
-#include "mojo/public/tests/test_support.h"
-#include "mojo/public/tests/test_utils.h"
+#include "mojo/public/cpp/test_support/test_support.h"
+#include "mojo/public/cpp/test_support/test_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // TODO(vtl): (here and below) crbug.com/342893
 #if !defined(WIN32)
 #include <time.h>
 #include "mojo/public/cpp/utility/thread.h"
 #endif  // !defined(WIN32)
 
 namespace {
 
@@ skipping 301 matching lines @@
   DoMessagePipeThreadedTest(1u, 1u, 10000u);
 
   DoMessagePipeThreadedTest(3u, 3u, 10u);
   // 100 was done above.
   DoMessagePipeThreadedTest(3u, 3u, 1000u);
   DoMessagePipeThreadedTest(3u, 3u, 10000u);
 }
 #endif  // !defined(WIN32)
 
 }  // namespace