chromium/content/public/browser/back_forward_cache.h

// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_PUBLIC_BROWSER_BACK_FORWARD_CACHE_H_
#define CONTENT_PUBLIC_BROWSER_BACK_FORWARD_CACHE_H_

#include <cstdint>
#include <map>
#include <optional>
#include <set>

#include "content/common/content_export.h"
#include "content/public/browser/global_routing_id.h"
#include "services/metrics/public/cpp/ukm_source_id.h"

namespace content {

class Page;
class RenderFrameHost;

// Public API for the BackForwardCache.
//
// After the user navigates away from a document, the old one might go into the
// frozen state and will be kept in the cache. It can potentially be reused
// at a later time if the user navigates back.
//
// Not all documents can or will be cached. You should not assume a document
// will be cached.
//
// All methods of this class should be called from the UI thread.
class CONTENT_EXPORT BackForwardCache { … };

}  // namespace content

#endif  // CONTENT_PUBLIC_BROWSER_BACK_FORWARD_CACHE_H_