chromium/chrome/browser/tracing/trace_event_system_stats_monitor.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 CHROME_BROWSER_TRACING_TRACE_EVENT_SYSTEM_STATS_MONITOR_H_
#define CHROME_BROWSER_TRACING_TRACE_EVENT_SYSTEM_STATS_MONITOR_H_

#include "base/memory/weak_ptr.h"
#include "base/process/process_metrics.h"
#include "base/trace_event/trace_log.h"
#include "chrome/browser/performance_monitor/system_monitor.h"

namespace tracing {

// Watches for chrome://tracing to be enabled or disabled. When tracing is
// enabled, also enables system events profiling. This class is the preferred
// way to turn system tracing on and off.
class TraceEventSystemStatsMonitor
    : public base::trace_event::TraceLog::AsyncEnabledStateObserver,
      public performance_monitor::SystemMonitor::SystemObserver { … };

}  // namespace tracing

#endif  // CHROME_BROWSER_TRACING_TRACE_EVENT_SYSTEM_STATS_MONITOR_H_