Histogram type support in HistogramBase and remove SetRangeDescription function

net/disk_cache/stats_histogram.cc

 // 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.
 
 #include "net/disk_cache/stats_histogram.h"
 
 #include "base/debug/leak_annotations.h"
 #include "base/logging.h"
 #include "base/metrics/bucket_ranges.h"
 #include "base/metrics/histogram_base.h"
@@ skipping 45 matching lines @@
         StatisticsRecorder::RegisterOrDeleteDuplicateRanges(ranges);
 
     // To avoid racy destruction at shutdown, the following will be leaked.
     StatsHistogram* stats_histogram =
         new StatsHistogram(name, minimum, maximum, bucket_count,
                            registered_ranges, stats);
     stats_histogram->SetFlags(kUmaTargetedHistogramFlag);
     histogram = StatisticsRecorder::RegisterOrDeleteDuplicate(stats_histogram);
   }
 
-  DCHECK(HISTOGRAM == histogram->histogram_type());
+  DCHECK(base::HISTOGRAM == histogram->GetHistogramType());
   DCHECK(histogram->HasConstructionArguments(minimum, maximum, bucket_count));
 
   // We're preparing for an otherwise unsafe upcast by ensuring we have the
   // proper class type.
   StatsHistogram* return_histogram = static_cast<StatsHistogram*>(histogram);
   return return_histogram;
 }
 
 scoped_ptr<HistogramSamples> StatsHistogram::SnapshotSamples() const {
   scoped_ptr<SampleVector> samples(new SampleVector(bucket_ranges()));
   stats_->Snapshot(samples.get());
 
   // Only report UMA data once.
   StatsHistogram* mutable_me = const_cast<StatsHistogram*>(this);
   mutable_me->ClearFlags(kUmaTargetedHistogramFlag);
 
   return samples.PassAs<HistogramSamples>();
 }
 
 Histogram::Inconsistencies StatsHistogram::FindCorruption(
     const HistogramSamples& samples) const {
   return NO_INCONSISTENCIES;  // This class won't monitor inconsistencies.
 }
 
 }  // namespace disk_cache