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// Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_HISTOGRAM_FETCHER_H_
#define CONTENT_PUBLIC_BROWSER_HISTOGRAM_FETCHER_H_
#include "base/callback.h"
#include "base/task_runner.h"
#include "base/time/time.h"
#include "content/common/content_export.h"
namespace content {
// Fetch histogram data asynchronously from the various child processes, into
// the browser process. This method is used by the metrics services in
// preparation for a log upload. It contacts all processes, and get them to
// upload to the browser any/all changes to histograms. When all changes have
// been acquired, or when the wait time expires (whichever is sooner), post the
// callback to the specified TaskRunner. Note the callback is posted exactly
// once.
CONTENT_EXPORT void FetchHistogramsAsynchronously(
scoped_refptr<base::TaskRunner> task_runner,
base::OnceClosure callback,
base::TimeDelta wait_time);
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_HISTOGRAM_FETCHER_H_
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