Revert of [Tracing] Add allocation register for heap profiling

base/trace_event/memory_profiler_allocation_register_win.cc

-// 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.
-
-#include "base/trace_event/memory_profiler_allocation_register.h"
-
-#include <windows.h>
-
-#include "base/bits.h"
-#include "base/logging.h"
-#include "base/process/process_metrics.h"
-
-namespace base {
-namespace trace_event {
-
-namespace {
-size_t GetGuardSize() {
-  return GetPageSize();
-}
-}
-
-// static
-void* AllocationRegister::AllocateVirtualMemory(size_t size) {
-  size = bits::Align(size, GetPageSize());
-
-  // Add space for a guard page at the end.
-  size_t map_size = size + GetGuardSize();
-
-  // Reserve the address space. This does not make the memory usable yet.
-  void* addr = VirtualAlloc(nullptr, map_size, MEM_RESERVE, PAGE_NOACCESS);
-
-  PCHECK(addr != nullptr);
-
-  // Commit the non-guard pages as read-write memory.
-  void* result = VirtualAlloc(addr, size, MEM_COMMIT, PAGE_READWRITE);
-
-  PCHECK(result != nullptr);
-
-  // Mark the last page of the allocated address space as guard page. (NB: The
-  // |PAGE_GUARD| flag is not the flag to use here, that flag can be used to
-  // detect and intercept access to a certain memory region. Accessing a
-  // |PAGE_NOACCESS| page will raise a general protection fault.) The
-  // read/write accessible space is still at least |min_size| bytes.
-  void* guard_addr =
-      reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(addr) + size);
-  result = VirtualAlloc(guard_addr, GetGuardSize(), MEM_COMMIT, PAGE_NOACCESS);
-  PCHECK(result != nullptr);
-
-  return addr;
-}
-
-// static
-void AllocationRegister::FreeVirtualMemory(void* address,
-                                           size_t allocated_size) {
-  // For |VirtualFree|, the size passed with |MEM_RELEASE| mut be 0. Windows
-  // automatically frees the entire region that was reserved by the
-  // |VirtualAlloc| with flag |MEM_RESERVE|.
-  VirtualFree(address, 0, MEM_RELEASE);
-}
-
-}  // namespace trace_event
-}  // namespace base