chromium/content/browser/scheduler/responsiveness/metric_source.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_SCHEDULER_RESPONSIVENESS_METRIC_SOURCE_H_
#define CONTENT_BROWSER_SCHEDULER_RESPONSIVENESS_METRIC_SOURCE_H_

#include <memory>

#include "base/functional/callback.h"
#include "base/functional/callback_helpers.h"
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "content/common/content_export.h"

namespace base {
struct PendingTask;
}  // namespace base

namespace content {
namespace responsiveness {

class MessageLoopObserver;
class NativeEventObserver;

// This class represents the source of browser responsiveness metrics.
// This class watches events and tasks processed on the UI and IO threads of the
// browser process. It notifies the registered Delegate implementer about
// event and task execution through the WillRun* and DidRun* methods.
//
// This class must only be constructed/destroyed on the UI thread. It has some
// private members that are affine to the IO thread. It takes care of deleting
// them appropriately.
//
// TODO(erikchen): Once the browser scheduler is implemented, this entire class
// should become simpler, as either BrowserUIThreadScheduler or
// BrowserIOThreadScheduler should implement much of the same functionality.
class CONTENT_EXPORT MetricSource { … };

}  // namespace responsiveness
}  // namespace content

#endif  // CONTENT_BROWSER_SCHEDULER_RESPONSIVENESS_METRIC_SOURCE_H_