Repo created

TMessagesProj/jni/voip/webrtc/base/metrics/histogram_flattener.h

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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 BASE_METRICS_HISTOGRAM_FLATTENER_H_
+#define BASE_METRICS_HISTOGRAM_FLATTENER_H_
+
+#include <map>
+#include <string>
+
+#include "base/macros.h"
+#include "base/metrics/histogram.h"
+
+namespace base {
+
+class HistogramSamples;
+
+// HistogramFlattener is an interface used by HistogramSnapshotManager, which
+// handles the logistics of gathering up available histograms for recording.
+class BASE_EXPORT HistogramFlattener {
+ public:
+  virtual ~HistogramFlattener() = default;
+
+  virtual void RecordDelta(const HistogramBase& histogram,
+                           const HistogramSamples& snapshot) = 0;
+
+ protected:
+  HistogramFlattener() = default;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(HistogramFlattener);
+};
+
+}  // namespace base
+
+#endif  // BASE_METRICS_HISTOGRAM_FLATTENER_H_