Minor refactoring for Zone class and friends.

src/zone-inl.h

-// Copyright 2012 the V8 project 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 V8_ZONE_INL_H_
-#define V8_ZONE_INL_H_
-
-#include "src/zone.h"
-
-#ifdef V8_USE_ADDRESS_SANITIZER
-  #include <sanitizer/asan_interface.h>
-#else
-  #define ASAN_UNPOISON_MEMORY_REGION(start, size) ((void) 0)
-#endif
-
-#include "src/counters.h"
-#include "src/isolate.h"
-#include "src/utils.h"
-
-namespace v8 {
-namespace internal {
-
-
-static const int kASanRedzoneBytes = 24;  // Must be a multiple of 8.
-
-
-bool Zone::excess_allocation() {
-  return segment_bytes_allocated_ > kExcessLimit;
-}
-
-
-void Zone::adjust_segment_bytes_allocated(int delta) {
-  segment_bytes_allocated_ += delta;
-}
-
-
-template <typename Config>
-ZoneSplayTree<Config>::~ZoneSplayTree() {
-  // Reset the root to avoid unneeded iteration over all tree nodes
-  // in the destructor.  For a zone-allocated tree, nodes will be
-  // freed by the Zone.
-  SplayTree<Config, ZoneAllocationPolicy>::ResetRoot();
-}
-
-
-void* ZoneObject::operator new(size_t size, Zone* zone) {
-  return zone->New(static_cast<int>(size));
-}
-
-inline void* ZoneAllocationPolicy::New(size_t size) {
-  DCHECK(zone_);
-  return zone_->New(static_cast<int>(size));
-}
-
-
-template <typename T>
-void* ZoneList<T>::operator new(size_t size, Zone* zone) {
-  return zone->New(static_cast<int>(size));
-}
-
-
-template <typename T>
-void* ZoneSplayTree<T>::operator new(size_t size, Zone* zone) {
-  return zone->New(static_cast<int>(size));
-}
-
-
-} }  // namespace v8::internal
-
-#endif  // V8_ZONE_INL_H_