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

mojo/public/cpp/environment/environment.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_PUBLIC_CPP_ENVIRONMENT_ENVIRONMENT_H_
-#define MOJO_PUBLIC_CPP_ENVIRONMENT_ENVIRONMENT_H_
-
-#include "mojo/public/cpp/system/macros.h"
-
-struct MojoAsyncWaiter;
-struct MojoLogger;
-
-namespace mojo {
-
-// This class just acts as a "namespace": it only has static methods (whose
-// implementation may be varied). Note that some implementations may require
-// their own explicit initialization/shut down functions to be called.
-class Environment {
- public:
-  static const MojoAsyncWaiter* GetDefaultAsyncWaiter();
-  // Setting the default async waiter to null will use the original default
-  // implementation.
-  static void SetDefaultAsyncWaiter(const MojoAsyncWaiter* async_waiter);
-
-  static const MojoLogger* GetDefaultLogger();
-  // Setting the logger to null will use the will use the original default
-  // implementation.
-  static void SetDefaultLogger(const MojoLogger* logger);
-
-  // These instantiate and destroy an environment-specific run loop for the
-  // current thread, allowing |GetDefaultAsyncWaiter()| to be used. (The run
-  // loop itself should be accessible via thread-local storage, using methods
-  // specific to the run loop implementation.) Creating and destroying nested
-  // run loops is not supported.
-  static void InstantiateDefaultRunLoop();
-  static void DestroyDefaultRunLoop();
-
- private:
-  Environment() = delete;
-  ~Environment() = delete;
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_CPP_ENVIRONMENT_ENVIRONMENT_H_