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

mojo/public/cpp/bindings/lib/fixed_buffer.cc

-// 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.
-
-#include "mojo/public/cpp/bindings/lib/fixed_buffer.h"
-
-#include <stdlib.h>
-
-#include <algorithm>
-
-#include "mojo/public/cpp/bindings/lib/bindings_serialization.h"
-#include "mojo/public/cpp/environment/logging.h"
-
-namespace mojo {
-namespace internal {
-
-FixedBuffer::FixedBuffer() : ptr_(nullptr), cursor_(0), size_(0) {}
-
-void FixedBuffer::Initialize(void* memory, size_t size) {
-  ptr_ = static_cast<char*>(memory);
-  cursor_ = 0;
-  size_ = size;
-}
-
-void* FixedBuffer::Allocate(size_t delta) {
-  // Ensure that all memory returned by Allocate() is 8-byte aligned w.r.t the
-  // start of the buffer.
-  delta = internal::Align(delta);
-
-  if (delta == 0 || delta > size_ - cursor_) {
-    MOJO_DCHECK(false) << "Not reached";
-    return nullptr;
-  }
-
-  char* result = ptr_ + cursor_;
-  cursor_ += delta;
-
-  return result;
-}
-
-FixedBufferForTesting::FixedBufferForTesting(size_t size) {
-  size_ = internal::Align(size);
-  // Use calloc here to ensure all message memory is zero'd out.
-  ptr_ = static_cast<char*>(calloc(size_, 1));
-}
-
-FixedBufferForTesting::~FixedBufferForTesting() {
-  free(ptr_);
-}
-
-void* FixedBufferForTesting::Leak() {
-  char* ptr = ptr_;
-  ptr_ = nullptr;
-  cursor_ = 0;
-  size_ = 0;
-  return ptr;
-}
-
-}  // namespace internal
-}  // namespace mojo