Move scoped_test_dir.* and test_io_thread.* from edk/test to edk/system/test.

mojo/edk/system/multiprocess_message_pipe_unittest.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.
 
 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "build/build_config.h"  // TODO(vtl): Remove this.
 #include "mojo/edk/embedder/platform_shared_buffer.h"
 #include "mojo/edk/embedder/scoped_platform_handle.h"
 #include "mojo/edk/system/channel.h"
 #include "mojo/edk/system/dispatcher.h"
 #include "mojo/edk/system/message_pipe.h"
 #include "mojo/edk/system/message_pipe_test_utils.h"
 #include "mojo/edk/system/platform_handle_dispatcher.h"
 #include "mojo/edk/system/raw_channel.h"
 #include "mojo/edk/system/ref_ptr.h"
 #include "mojo/edk/system/shared_buffer_dispatcher.h"
-#include "mojo/edk/test/scoped_test_dir.h"
+#include "mojo/edk/system/test/scoped_test_dir.h"
 #include "mojo/edk/test/test_utils.h"
 #include "mojo/edk/util/scoped_file.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace system {
 namespace {
 
 class MultiprocessMessagePipeTest
     : public test::MultiprocessMessagePipeTestBase {};
@@ skipping 401 matching lines @@
   }
 
   return 0;
 }
 
 class MultiprocessMessagePipeTestWithPipeCount
     : public test::MultiprocessMessagePipeTestBase,
       public testing::WithParamInterface<size_t> {};
 
 TEST_P(MultiprocessMessagePipeTestWithPipeCount, PlatformHandlePassing) {
-  mojo::test::ScopedTestDir test_dir;
+  test::ScopedTestDir test_dir;
 
   helper()->StartChild("CheckPlatformHandleFile");
 
   RefPtr<ChannelEndpoint> ep;
   auto mp = MessagePipe::CreateLocalProxy(&ep);
   Init(std::move(ep));
 
   std::vector<RefPtr<PlatformHandleDispatcher>> dispatchers;
   std::vector<DispatcherTransport> transports;
 
@@ skipping 44 matching lines @@
 // Android multi-process tests are not executing the new process. This is flaky.
 #if !defined(OS_ANDROID)
 INSTANTIATE_TEST_CASE_P(PipeCount,
                         MultiprocessMessagePipeTestWithPipeCount,
                         testing::Values(1u, 128u, 140u));
 #endif
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo