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// Copyright 2014 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.
// This file defines an utility function that records any changes in a given
// histogram for transmission.
#ifndef COMPONENTS_METRICS_HISTOGRAM_ENCODER_H_
#define COMPONENTS_METRICS_HISTOGRAM_ENCODER_H_
#include <string>
#include "components/metrics/proto/chrome_user_metrics_extension.pb.h"
namespace base {
class HistogramSamples;
}
namespace metrics {
// Record any changes (histogram deltas of counts from |snapshot|) into
// |uma_proto| for the given histogram (|histogram_name|).
void EncodeHistogramDelta(const std::string& histogram_name,
const base::HistogramSamples& snapshot,
ChromeUserMetricsExtension* uma_proto);
} // namespace metrics
#endif // COMPONENTS_METRICS_HISTOGRAM_ENCODER_H_
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