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

mojo/public/cpp/bindings/lib/message_validation.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_MESSAGE_VALIDATION_H_
-#define MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_VALIDATION_H_
-
-#include <string>
-
-#include "mojo/public/cpp/bindings/lib/bounds_checker.h"
-#include "mojo/public/cpp/bindings/lib/validation_errors.h"
-#include "mojo/public/cpp/bindings/message.h"
-
-namespace mojo {
-namespace internal {
-
-// Validates that the message is a request which doesn't expect a response.
-ValidationError ValidateMessageIsRequestWithoutResponse(const Message* message,
-                                                        std::string* err);
-// Validates that the message is a request expecting a response.
-ValidationError ValidateMessageIsRequestExpectingResponse(
-    const Message* message,
-    std::string* err);
-// Validates that the message is a response.
-ValidationError ValidateMessageIsResponse(const Message* message,
-                                          std::string* err);
-
-// Validates that the message payload is a valid struct of type ParamsType.
-template <typename ParamsType>
-ValidationError ValidateMessagePayload(const Message* message,
-                                       std::string* err) {
-  BoundsChecker bounds_checker(message->payload(), message->payload_num_bytes(),
-                               message->handles()->size());
-  return ParamsType::Validate(message->payload(), &bounds_checker, err);
-}
-
-}  // namespace internal
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_VALIDATION_H_