[mojo] Delete third_party/mojo

mojo/edk/system/message_pipe_test_utils.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_EDK_SYSTEM_MESSAGE_PIPE_TEST_UTILS_H_
-#define MOJO_EDK_SYSTEM_MESSAGE_PIPE_TEST_UTILS_H_
-
-#include "mojo/edk/test/multiprocess_test_helper.h"
-#include "mojo/public/cpp/system/macros.h"
-
-namespace mojo {
-namespace edk {
-
-class ChannelEndpoint;
-class MessagePipe;
-
-namespace test {
-
-#if !defined(OS_IOS)
-class MultiprocessMessagePipeTestBase : public testing::Test {
- public:
-  MultiprocessMessagePipeTestBase();
-  ~MultiprocessMessagePipeTestBase() override;
-
- protected:
-  test::MultiprocessTestHelper* helper() { return &helper_; }
-
- private:
-  test::MultiprocessTestHelper helper_;
-
-  MOJO_DISALLOW_COPY_AND_ASSIGN(MultiprocessMessagePipeTestBase);
-};
-#endif
-
-}  // namespace test
-}  // namespace edk
-}  // namespace mojo
-
-#endif  // MOJO_EDK_SYSTEM_MESSAGE_PIPE_TEST_UTILS_H_