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

mojo/public/cpp/utility/run_loop_handler.h

-// 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.
-
-#ifndef MOJO_PUBLIC_CPP_UTILITY_RUN_LOOP_HANDLER_H_
-#define MOJO_PUBLIC_CPP_UTILITY_RUN_LOOP_HANDLER_H_
-
-#include <mojo/result.h>
-#include <stdint.h>
-
-#include "mojo/public/cpp/system/handle.h"
-
-namespace mojo {
-
-// Used by RunLoop to notify when a handle is either ready or has become
-// invalid.
-class RunLoopHandler {
- public:
-  using Id = uint64_t;
-
-  // Called when wait for the handle is ready (i.e., waiting yields
-  // MOJO_RESULT_OK).
-  virtual void OnHandleReady(Id id) = 0;
-
-  // Called when waiting for the handle is no longer valid (i.e., waiting yields
-  // the error |result|). This is also called with MOJO_RESULT_ABORTED if the
-  // RunLoop is destroyed.
-  virtual void OnHandleError(Id id, MojoResult result) = 0;
-
- protected:
-  virtual ~RunLoopHandler() {}
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_CPP_UTILITY_RUN_LOOP_HANDLER_H_