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

mojo/public/cpp/environment/lib/async_waiter.cc

-// 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.
-
-#include "mojo/public/cpp/environment/async_waiter.h"
-
-namespace mojo {
-
-AsyncWaiter::AsyncWaiter(Handle handle,
-                         MojoHandleSignals signals,
-                         const Callback& callback)
-    : waiter_(Environment::GetDefaultAsyncWaiter()),
-      id_(0),
-      callback_(callback) {
-  id_ = waiter_->AsyncWait(handle.value(), signals, MOJO_DEADLINE_INDEFINITE,
-                           &AsyncWaiter::WaitComplete, this);
-}
-
-AsyncWaiter::~AsyncWaiter() {
-  if (id_)
-    waiter_->CancelWait(id_);
-}
-
-// static
-void AsyncWaiter::WaitComplete(void* waiter, MojoResult result) {
-  static_cast<AsyncWaiter*>(waiter)->WaitCompleteInternal(result);
-}
-
-void AsyncWaiter::WaitCompleteInternal(MojoResult result) {
-  id_ = 0;
-  callback_.Run(result);
-}
-
-}  // namespace mojo