chromium/components/omnibox/browser/favicon_cache.h

// Copyright 2018 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_OMNIBOX_BROWSER_FAVICON_CACHE_H_
#define COMPONENTS_OMNIBOX_BROWSER_FAVICON_CACHE_H_

#include <list>
#include <map>

#include "base/callback_list.h"
#include "base/containers/lru_cache.h"
#include "base/functional/callback_forward.h"
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/scoped_observation.h"
#include "base/task/cancelable_task_tracker.h"
#include "components/favicon_base/favicon_types.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"

namespace favicon {
class FaviconService;
}

namespace gfx {
class Image;
}

class GURL;

FaviconFetchedCallback;

// This caches favicons by both page URL and icon URL. We cache a small number
// of them so we can synchronously deliver them to the UI to prevent flicker as
// the user types.
//
// This class also observes the HistoryService, and invalidates cached favicons
// and null responses when matching favicons are updated.
class FaviconCache : public history::HistoryServiceObserver { … };

#endif  // COMPONENTS_OMNIBOX_BROWSER_FAVICON_CACHE_H_