prerender_histograms.h | Explore in Territory

// Copyright 2012 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_NO_STATE_PREFETCH_BROWSER_PRERENDER_HISTOGRAMS_H_
#define COMPONENTS_NO_STATE_PREFETCH_BROWSER_PRERENDER_HISTOGRAMS_H_

#include <string>

#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "components/no_state_prefetch/common/no_state_prefetch_final_status.h"
#include "components/no_state_prefetch/common/no_state_prefetch_origin.h"

namespace prerender {

// Records histograms for NoStatePrefetchManager.
//
// A few histograms are dynamically constructed to avoid binary size bloat from
// histogram_macros.h. Such histograms require careful handling:
// 1. slow - make sure only rare events are recorded this way, a handful of such
//    events per page load should be OK
// 2. may lead to small sporadic memory leaks in Histogram::Factory::Build() -
//    ensuring that they are recorded from the same thread is sufficient
//
// Besides thread checking this class is stateless, all public methods are
// const.
class PrerenderHistograms { … };

}  // namespace prerender

#endif  // COMPONENTS_NO_STATE_PREFETCH_BROWSER_PRERENDER_HISTOGRAMS_H_
chromium/components/no_state_prefetch/browser/prerender_histograms.h
