Make the fuchsia mojo/public repo the source of truth.

mojo/public/cpp/test_support/lib/test_utils.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/public/cpp/test_support/test_utils.h"
-
-#include "mojo/public/cpp/system/handle.h"
-#include "mojo/public/cpp/system/message_pipe.h"
-#include "mojo/public/cpp/system/wait.h"
-
-namespace mojo {
-namespace test {
-
-bool WriteTextMessage(const MessagePipeHandle& handle,
-                      const std::string& text) {
-  MojoResult rv =
-      WriteMessageRaw(handle, text.data(), static_cast<uint32_t>(text.size()),
-                      nullptr, 0u, MOJO_WRITE_MESSAGE_FLAG_NONE);
-  return rv == MOJO_RESULT_OK;
-}
-
-bool ReadTextMessage(const MessagePipeHandle& handle, std::string* text) {
-  MojoResult rv;
-  bool did_wait = false;
-
-  uint32_t num_bytes = 0u;
-  uint32_t num_handles = 0u;
-  for (;;) {
-    rv = ReadMessageRaw(handle, nullptr, &num_bytes, nullptr, &num_handles,
-                        MOJO_READ_MESSAGE_FLAG_NONE);
-    if (rv == MOJO_RESULT_SHOULD_WAIT) {
-      if (did_wait) {
-        assert(false);  // Looping endlessly!?
-        return false;
-      }
-      rv = Wait(handle, MOJO_HANDLE_SIGNAL_READABLE, MOJO_DEADLINE_INDEFINITE,
-                nullptr);
-      if (rv != MOJO_RESULT_OK)
-        return false;
-      did_wait = true;
-    } else {
-      assert(!num_handles);
-      break;
-    }
-  }
-
-  text->resize(num_bytes);
-  rv = ReadMessageRaw(handle, &text->at(0), &num_bytes, nullptr, &num_handles,
-                      MOJO_READ_MESSAGE_FLAG_NONE);
-  return rv == MOJO_RESULT_OK;
-}
-
-bool DiscardMessage(const MessagePipeHandle& handle) {
-  MojoResult rv = ReadMessageRaw(handle, nullptr, nullptr, nullptr, nullptr,
-                                 MOJO_READ_MESSAGE_FLAG_MAY_DISCARD);
-  return rv == MOJO_RESULT_OK;
-}
-
-}  // namespace test
-}  // namespace mojo