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

mojo/edk/test/test_io_thread.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 "mojo/edk/test/test_io_thread.h"
-
-#include "base/bind.h"
-#include "base/callback.h"
-#include "base/location.h"
-#include "base/synchronization/waitable_event.h"
-
-namespace mojo {
-namespace test {
-
-namespace {
-
-void PostTaskAndWaitHelper(base::WaitableEvent* event,
-                           const base::Closure& task) {
-  task.Run();
-  event->Signal();
-}
-
-}  // namespace
-
-TestIOThread::TestIOThread(StartMode start_mode)
-    : io_thread_("test_io_thread"), io_thread_started_(false) {
-  switch (start_mode) {
-    case StartMode::AUTO:
-      Start();
-      return;
-    case StartMode::MANUAL:
-      return;
-  }
-  CHECK(false) << "Invalid mode";
-}
-
-TestIOThread::~TestIOThread() {
-  Stop();
-}
-
-void TestIOThread::Start() {
-  CHECK(!io_thread_started_);
-  io_thread_started_ = true;
-  CHECK(io_thread_.StartWithOptions(
-      base::Thread::Options(base::MessageLoop::TYPE_IO, 0)));
-}
-
-void TestIOThread::Stop() {
-  // Note: It's okay to call |Stop()| even if the thread isn't running.
-  io_thread_.Stop();
-  io_thread_started_ = false;
-}
-
-void TestIOThread::PostTask(const base::Closure& task) {
-  task_runner()->PostTask(tracked_objects::Location(), task);
-}
-
-void TestIOThread::PostTaskAndWait(const base::Closure& task) {
-  base::WaitableEvent event(false, false);
-  task_runner()->PostTask(tracked_objects::Location(),
-                          base::Bind(&PostTaskAndWaitHelper, &event, task));
-  event.Wait();
-}
-
-}  // namespace test
-}  // namespace mojo