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

mojo/public/c/include/mojo/bindings/internal/util.h

-// Copyright 2016 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_C_INCLUDE_MOJO_BINDINGS_INTERNAL_UTIL_H_
-#define MOJO_PUBLIC_C_INCLUDE_MOJO_BINDINGS_INTERNAL_UTIL_H_
-
-#include <mojo/macros.h>
-#include <stdint.h>
-
-// Rounds-up |num| to 8. The result is undefined if this results in an overflow.
-#define MOJOM_INTERNAL_ROUND_TO_8(num) (((num) + 7) & ~7)
-
-// Represents the memory layout of a mojom pointer; it is a |ptr| (pointer to
-// some memory) when unencoded, and refers to a relative |offset| when encoded.
-union MojomPointer {
-  void* ptr;
-  uint64_t offset;
-};
-MOJO_STATIC_ASSERT(sizeof(union MojomPointer) == 8,
-                   "union MojomPointer must be 8 bytes");
-
-// This struct represents the state we need to keep when validating an encoded
-// mojom type.
-struct MojomValidationContext {
-  // |next_handle_index| is a counter that represents the next-available index
-  // into the handle array. Previous indices have already been used up. This
-  // counter is non-decreasing as it is used throughout validation.
-  uint32_t next_handle_index;
-
-  // As we validate, we keep track of the point where pointers can point to,
-  // since two pointers may not point to the same memory region.
-  char* next_pointer;
-
-  // TODO(vardhan): Include an error string? How big should it be?
-};
-
-#endif  // MOJO_PUBLIC_C_INCLUDE_MOJO_BINDINGS_INTERNAL_UTIL_H_