chromium/components/history/core/browser/top_sites_impl.h

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_HISTORY_CORE_BROWSER_TOP_SITES_IMPL_H_
#define COMPONENTS_HISTORY_CORE_BROWSER_TOP_SITES_IMPL_H_

#include <stddef.h>

#include <string>
#include <utility>
#include <vector>

#include "base/functional/callback.h"
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/scoped_observation.h"
#include "base/synchronization/lock.h"
#include "base/task/cancelable_task_tracker.h"
#include "base/threading/thread_checker.h"
#include "base/timer/timer.h"
#include "components/history/core/browser/history_service.h"
#include "components/history/core/browser/history_service_observer.h"
#include "components/history/core/browser/history_types.h"
#include "components/history/core/browser/top_sites.h"
#include "components/history/core/browser/top_sites_backend.h"

class PrefRegistrySimple;
class PrefService;
class TemplateURLService;

namespace base {
class FilePath;
}

namespace history {

class TopSitesImplTest;
struct SitesAndQueriesRequest;

// How many top sites to store in the cache.
static constexpr size_t kTopSitesNumber = …;

// This class allows requests for most visited urls on any thread. All other
// methods must be invoked on the UI thread. All mutations to internal state
// happen on the UI thread and are scheduled to update the db using
// TopSitesBackend.
class TopSitesImpl : public TopSites, public HistoryServiceObserver { … };

}  // namespace history

#endif  // COMPONENTS_HISTORY_CORE_BROWSER_TOP_SITES_IMPL_H_