Move base to DEPS

base/metrics/histogram_delta_serialization.h

-// Copyright 2013 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_DELTA_SERIALIZATION_H_
-#define BASE_METRICS_HISTOGRAM_DELTA_SERIALIZATION_H_
-
-#include <string>
-#include <vector>
-
-#include "base/base_export.h"
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/metrics/histogram_flattener.h"
-#include "base/metrics/histogram_snapshot_manager.h"
-
-namespace base {
-
-class HistogramBase;
-
-// Serializes and restores histograms deltas.
-class BASE_EXPORT HistogramDeltaSerialization : public HistogramFlattener {
- public:
-  // |caller_name| is string used in histograms for counting inconsistencies.
-  explicit HistogramDeltaSerialization(const std::string& caller_name);
-  ~HistogramDeltaSerialization() override;
-
-  // Computes deltas in histogram bucket counts relative to the previous call to
-  // this method. Stores the deltas in serialized form into |serialized_deltas|.
-  // If |serialized_deltas| is NULL, no data is serialized, though the next call
-  // will compute the deltas relative to this one.
-  void PrepareAndSerializeDeltas(std::vector<std::string>* serialized_deltas);
-
-  // Deserialize deltas and add samples to corresponding histograms, creating
-  // them if necessary. Silently ignores errors in |serialized_deltas|.
-  static void DeserializeAndAddSamples(
-      const std::vector<std::string>& serialized_deltas);
-
- private:
-  // HistogramFlattener implementation.
-  void RecordDelta(const HistogramBase& histogram,
-                   const HistogramSamples& snapshot) override;
-  void InconsistencyDetected(HistogramBase::Inconsistency problem) override;
-  void UniqueInconsistencyDetected(
-      HistogramBase::Inconsistency problem) override;
-  void InconsistencyDetectedInLoggedCount(int amount) override;
-
-  // Calculates deltas in histogram counters.
-  HistogramSnapshotManager histogram_snapshot_manager_;
-
-  // Output buffer for serialized deltas.
-  std::vector<std::string>* serialized_deltas_;
-
-  // Histograms to count inconsistencies in snapshots.
-  HistogramBase* inconsistencies_histogram_;
-  HistogramBase* inconsistencies_unique_histogram_;
-  HistogramBase* inconsistent_snapshot_histogram_;
-
-  DISALLOW_COPY_AND_ASSIGN(HistogramDeltaSerialization);
-};
-
-}  // namespace base
-
-#endif  // BASE_METRICS_HISTOGRAM_DELTA_SERIALIZATION_H_