chromium/content/browser/renderer_host/back_forward_cache_metrics.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_BROWSER_RENDERER_HOST_BACK_FORWARD_CACHE_METRICS_H_
#define CONTENT_BROWSER_RENDERER_HOST_BACK_FORWARD_CACHE_METRICS_H_

#include <bitset>
#include <memory>
#include <optional>

#include "base/containers/enum_set.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/time/time.h"
#include "content/browser/renderer_host/should_swap_browsing_instance.h"
#include "content/common/content_export.h"
#include "content/public/browser/back_forward_cache.h"
#include "third_party/blink/public/common/scheduler/web_scheduler_tracked_feature.h"
#include "third_party/blink/public/mojom/back_forward_cache_not_restored_reasons.mojom-forward.h"

namespace base {
class TickClock;
}

namespace url {
class Origin;
}

namespace content {
class BackForwardCacheCanStoreDocumentResult;
class BackForwardCacheCanStoreTreeResult;
class NavigationEntryImpl;
class NavigationRequest;
class RenderFrameHostImpl;
struct BackForwardCacheCanStoreDocumentResultWithTree;

// Helper class for recording metrics around history navigations.
// Associated with a main frame document and shared between all
// NavigationEntries with the same document_sequence_number for the main
// document.
//
// TODO(altimin, crbug.com/933147): Remove this class after we are done
// with implementing back-forward cache.
class BackForwardCacheMetrics
    : public base::RefCounted<BackForwardCacheMetrics> { … };

}  // namespace content

#endif  // CONTENT_BROWSER_RENDERER_HOST_BACK_FORWARD_CACHE_METRICS_H_