chrome/browser/performance_manager/mechanisms/page_discarder.h

// Copyright 2020 The Chromium 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 CHROME_BROWSER_PERFORMANCE_MANAGER_MECHANISMS_PAGE_DISCARDER_H_
#define CHROME_BROWSER_PERFORMANCE_MANAGER_MECHANISMS_PAGE_DISCARDER_H_

#include "base/callback.h"
#include "base/macros.h"

namespace performance_manager {

class PageNode;

namespace mechanism {

// Mechanism that allows discarding a PageNode.
class PageDiscarder {
 public:
  PageDiscarder() = default;
  virtual ~PageDiscarder() = default;
  PageDiscarder(const PageDiscarder& other) = delete;
  PageDiscarder& operator=(const PageDiscarder&) = delete;

  // Discards |page_node| and run |post_discard_cb| on the origin sequence once
  // this is done.
  virtual void DiscardPageNode(const PageNode* page_node,
                               base::OnceCallback<void(bool)> post_discard_cb);
};

}  // namespace mechanism
}  // namespace performance_manager

#endif  // CHROME_BROWSER_PERFORMANCE_MANAGER_MECHANISMS_PAGE_DISCARDER_H_