Another macro for 100 linear slots...

base/histogram.h

 // Copyright (c) 2006-2008 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).
 
 // It supports calls to accumulate either time intervals (which are processed
 // as integral number of milliseconds), or arbitrary integral units.
@@ skipping 36 matching lines @@
     static Histogram counter((name), base::TimeDelta::FromMilliseconds(1), \
                              base::TimeDelta::FromSeconds(10), 50); \
     counter.AddTime(sample); \
   } while (0)
 
 #define HISTOGRAM_COUNTS(name, sample) do { \
     static Histogram counter((name), 1, 1000000, 50); \
     counter.Add(sample); \
   } while (0)
 
+#define HISTOGRAM_COUNTS_100(name, sample) do { \
+    static Histogram counter((name), 1, 100, 50); \
+    counter.Add(sample); \
+  } while (0)
+
 // For folks that need real specific times, use this, but you'll only get
 // samples that are in the range (overly large samples are discarded).
 #define HISTOGRAM_CLIPPED_TIMES(name, sample, min, max, bucket_count) do { \
     static Histogram counter((name), min, max, bucket_count); \
     if ((sample) < (max)) counter.AddTime(sample); \
   } while (0)
 
 //------------------------------------------------------------------------------
 // This macro set is for a histogram that can support both addition and removal
 // of samples. It should be used to render the accumulated asset allocation
@@ skipping 407 matching lines @@
   static Lock* lock_;
 
   // Dump all known histograms to log.
   static bool dump_on_exit_;
 
   DISALLOW_EVIL_CONSTRUCTORS(StatisticsRecorder);
 };
 
 #endif  // BASE_HISTOGRAM_H__