Reorganize histograms for persistence.

net/disk_cache/blockfile/stats.cc

 // Copyright (c) 2011 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/blockfile/stats.h"
 
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/metrics/bucket_ranges.h"
 #include "base/metrics/histogram.h"
@@ skipping 132 matching lines @@
   int min = 1;
   int max = 64 * 1024;
   int num_buckets = 75;
   base::BucketRanges ranges(num_buckets + 1);
   base::Histogram::InitializeBucketRanges(min, max, &ranges);
 
   base::HistogramBase* stats_histogram = base::Histogram::FactoryGet(
       "DiskCache.SizeStats2", min, max, num_buckets,
       base::HistogramBase::kUmaTargetedHistogramFlag);
 
-  base::SampleVector samples(&ranges);
+  base::SampleVector samples(0, &ranges);
   for (int i = 0; i < kDataSizesLength; i++) {
     // This is a good time to fix any inconsistent data. The count should be
     // always positive, but if it's not, reset the value now.
     if (data_sizes_[i] < 0)
       data_sizes_[i] = 0;
 
     samples.Accumulate(GetBucketRange(i) / 1024, data_sizes_[i]);
   }
   stats_histogram->AddSamples(samples);
 }
@@ skipping 156 matching lines @@
 int Stats::GetRatio(Counters hit, Counters miss) const {
   int64 ratio = GetCounter(hit) * 100;
   if (!ratio)
     return 0;
 
   ratio /= (GetCounter(hit) + GetCounter(miss));
   return static_cast<int>(ratio);
 }
 
 }  // namespace disk_cache