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

mojo/public/cpp/bindings/lib/control_message_proxy.h

-// Copyright 2015 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_BINDINGS_LIB_CONTROL_MESSAGE_PROXY_H_
-#define MOJO_PUBLIC_CPP_BINDINGS_LIB_CONTROL_MESSAGE_PROXY_H_
-
-#include <stdint.h>
-
-#include "mojo/public/cpp/bindings/callback.h"
-#include "mojo/public/cpp/system/macros.h"
-
-namespace mojo {
-
-class MessageReceiverWithResponder;
-
-namespace internal {
-
-// Proxy for request messages defined in interface_control_messages.mojom.
-class ControlMessageProxy {
- public:
-  // Doesn't take ownership of |receiver|. It must outlive this object.
-  explicit ControlMessageProxy(MessageReceiverWithResponder* receiver);
-
-  void QueryVersion(const Callback<void(uint32_t)>& callback);
-  void RequireVersion(uint32_t version);
-
- protected:
-  // Not owned.
-  MessageReceiverWithResponder* receiver_;
-
-  MOJO_DISALLOW_COPY_AND_ASSIGN(ControlMessageProxy);
-};
-
-}  // namespace internal
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_CONTROL_MESSAGE_PROXY_H_