Until we have sparse histograms, to track error codes, we are using...

base/metrics/histogram.cc

 // Copyright (c) 2010 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.
 
 // Histogram is an object that aggregates statistics, and can summarize them in
 // various forms, including ASCII graphical, HTML, and numerically (as a
 // vector of numbers corresponding to each of the aggregating buckets).
 // See header file for details and examples.
 
 #include "base/metrics/histogram.h"
@@ skipping 53 matching lines @@
 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, 0x37d83bf0L, 0xa9bcae53L,
 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L,
 0x24b4a3a6L, 0xbad03605L, 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL,
 0xc4614ab8L, 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
 0x2d02ef8dL,
 };
 
 typedef Histogram::Count Count;
 
 // static
-const size_t Histogram::kBucketCount_MAX = 10000u;
+const size_t Histogram::kBucketCount_MAX = 16384u;
 
 scoped_refptr<Histogram> Histogram::FactoryGet(const std::string& name,
     Sample minimum, Sample maximum, size_t bucket_count, Flags flags) {
   scoped_refptr<Histogram> histogram(NULL);
 
   // Defensive code.
   if (minimum < 1)
     minimum = 1;
   if (maximum > kSampleType_MAX - 1)
     maximum = kSampleType_MAX - 1;
@@ skipping 1045 matching lines @@
 }
 
 // static
 StatisticsRecorder::HistogramMap* StatisticsRecorder::histograms_ = NULL;
 // static
 base::Lock* StatisticsRecorder::lock_ = NULL;
 // static
 bool StatisticsRecorder::dump_on_exit_ = false;
 
 }  // namespace base