Move base to DEPS

base/metrics/histogram_snapshot_manager.h

-// 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_SNAPSHOT_MANAGER_H_
-#define BASE_METRICS_HISTOGRAM_SNAPSHOT_MANAGER_H_
-
-#include <map>
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/metrics/histogram_base.h"
-
-namespace base {
-
-class HistogramSamples;
-class HistogramFlattener;
-
-// HistogramSnapshotManager handles the logistics of gathering up available
-// histograms for recording either to disk or for transmission (such as from
-// renderer to browser, or from browser to UMA upload). Since histograms can sit
-// in memory for an extended period of time, and are vulnerable to memory
-// corruption, this class also validates as much rendundancy as it can before
-// calling for the marginal change (a.k.a., delta) in a histogram to be
-// recorded.
-class BASE_EXPORT HistogramSnapshotManager {
- public:
-  explicit HistogramSnapshotManager(HistogramFlattener* histogram_flattener);
-  virtual ~HistogramSnapshotManager();
-
-  // Snapshot all histograms, and ask |histogram_flattener_| to record the
-  // delta. |flags_to_set| is used to set flags for each histogram.
-  // |required_flags| is used to select histograms to be recorded.
-  // Only histograms that have all the flags specified by the argument will be
-  // chosen. If all histograms should be recorded, set it to
-  // |Histogram::kNoFlags|.
-  void PrepareDeltas(HistogramBase::Flags flags_to_set,
-                     HistogramBase::Flags required_flags);
-
- private:
-  // Snapshot this histogram, and record the delta.
-  void PrepareDelta(const HistogramBase& histogram);
-
-  // Try to detect and fix count inconsistency of logged samples.
-  void InspectLoggedSamplesInconsistency(
-      const HistogramSamples& new_snapshot,
-      HistogramSamples* logged_samples);
-
-  // For histograms, track what we've already recorded (as a sample for
-  // each histogram) so that we can record only the delta with the next log.
-  std::map<std::string, HistogramSamples*> logged_samples_;
-
-  // List of histograms found to be corrupt, and their problems.
-  std::map<std::string, int> inconsistencies_;
-
-  // |histogram_flattener_| handles the logistics of recording the histogram
-  // deltas.
-  HistogramFlattener* histogram_flattener_;  // Weak.
-
-  DISALLOW_COPY_AND_ASSIGN(HistogramSnapshotManager);
-};
-
-}  // namespace base
-
-#endif  // BASE_METRICS_HISTOGRAM_SNAPSHOT_MANAGER_H_