chromium/components/performance_manager/public/decorators/page_live_state_decorator.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 COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_DECORATORS_PAGE_LIVE_STATE_DECORATOR_H_
#define COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_DECORATORS_PAGE_LIVE_STATE_DECORATOR_H_

#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/observer_list_types.h"
#include "base/sequence_checker.h"
#include "components/performance_manager/public/graph/graph.h"
#include "components/performance_manager/public/graph/node_data_describer.h"
#include "components/performance_manager/public/graph/page_node.h"
#include "ui/accessibility/ax_mode.h"
#include "url/gurl.h"

namespace content {
class WebContents;
}  // namespace content

namespace performance_manager {

class PageNode;
class PageLiveStateObserver;

// Used to record some live state information about the PageNode.
// All the functions that take a WebContents* as a parameter should only be
// called from the UI thread, the event will be forwarded to the corresponding
// PageNode on the Performance Manager's sequence.
class PageLiveStateDecorator : public GraphOwnedDefaultImpl,
                               public NodeDataDescriberDefaultImpl,
                               public PageNode::ObserverDefaultImpl { … };

class PageLiveStateDecorator::Data { … };

class PageLiveStateObserver : public base::CheckedObserver { … };

class PageLiveStateObserverDefaultImpl : public PageLiveStateObserver { … };

}  // namespace performance_manager

#endif  // COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_DECORATORS_PAGE_LIVE_STATE_DECORATOR_H_