[UMA] Remove redundant bucket_count variable from base::Histogram.

net/disk_cache/stats_histogram.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 NET_DISK_CACHE_STATS_HISTOGRAM_H_
 #define NET_DISK_CACHE_STATS_HISTOGRAM_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 14 matching lines @@
 // SampleVector with a copy of our data.
 //
 // Class derivation of Histogram "deprecated," and should not be copied, and
 // may eventually go away.
 //
 class StatsHistogram : public base::Histogram {
  public:
   StatsHistogram(const std::string& name,
                  Sample minimum,
                  Sample maximum,
-                 size_t bucket_count,
                  const base::BucketRanges* ranges,
                  const Stats* stats);
   virtual ~StatsHistogram();
 
   static void InitializeBucketRanges(const Stats* stats,
                                      base::BucketRanges* ranges);
   static StatsHistogram* FactoryGet(const std::string& name,
                                     const Stats* stats);
 
   virtual scoped_ptr<base::HistogramSamples> SnapshotSamples() const OVERRIDE;
   virtual int FindCorruption(
       const base::HistogramSamples& samples) const OVERRIDE;
 
  private:
   const Stats* stats_;
   DISALLOW_COPY_AND_ASSIGN(StatsHistogram);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_STATS_HISTOGRAM_H_