Remove mojo::edk::test::ScopedIPCSupport

mojo/edk/test/scoped_ipc_support.cc

-// Copyright 2015 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/scoped_ipc_support.h"
-
-#include "base/bind.h"
-#include "base/run_loop.h"
-#include "base/synchronization/waitable_event.h"
-#include "base/threading/thread_task_runner_handle.h"
-#include "mojo/edk/embedder/embedder.h"
-
-namespace mojo {
-namespace edk {
-namespace test {
-
-namespace {
-base::TaskRunner* g_io_task_runner = nullptr;
-}
-
-base::TaskRunner* GetIoTaskRunner() {
-  return g_io_task_runner;
-}
-
-ScopedIPCSupport::ScopedIPCSupport(
-    scoped_refptr<base::TaskRunner> io_thread_task_runner)
-    : shutdown_event_(base::WaitableEvent::ResetPolicy::MANUAL,
-                      base::WaitableEvent::InitialState::NOT_SIGNALED) {
-  g_io_task_runner = io_thread_task_runner.get();
-  InitIPCSupport(this, io_thread_task_runner);
-}
-
-ScopedIPCSupport::~ScopedIPCSupport() {
-  // ShutdownIPCSupport always runs OnShutdownComplete on the current
-  // ThreadTaskRunnerHandle if set. Otherwise it's run on the IPC thread. We
-  // account for both possibilities here to avoid unnecessarily starting a new
-  // MessageLoop or blocking the existing one.
-  //
-  // TODO(rockot): Clean this up. ShutdownIPCSupport should probably always call
-  // call OnShutdownComplete from the IPC thread.
-  ShutdownIPCSupport();
-  if (base::ThreadTaskRunnerHandle::IsSet()) {
-    base::RunLoop run_loop;
-    shutdown_closure_ = base::Bind(IgnoreResult(&base::TaskRunner::PostTask),
-                                   base::ThreadTaskRunnerHandle::Get(),
-                                   FROM_HERE, run_loop.QuitClosure());
-    run_loop.Run();
-  } else {
-    shutdown_event_.Wait();
-  }
-}
-
-void ScopedIPCSupport::OnShutdownComplete() {
-  if (!shutdown_closure_.is_null())
-    shutdown_closure_.Run();
-  else
-    shutdown_event_.Signal();
-}
-
-}  // namespace test
-}  // namespace edk
-}  // namespace mojo