Implement write methods for SparseHistogram

base/metrics/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.
 
 // 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 493 matching lines @@
   void WriteAsciiHeader(const SampleVector& samples,
                         Count sample_count,
                         std::string* output) const;
 
   // Write information about previous, current, and next buckets.
   // Information such as cumulative percentage, etc.
   void WriteAsciiBucketContext(const int64 past, const Count current,
                                const int64 remaining, const size_t i,
                                std::string* output) const;
 
-  // Write textual description of the bucket contents (relative to histogram).
-  // Output is the count in the buckets, as well as the percentage.
-  void WriteAsciiBucketValue(Count current, double scaled_sum,
-                             std::string* output) const;
-
-  // Produce actual graph (set of blank vs non blank char's) for a bucket.
-  void WriteAsciiBucketGraph(double current_size, double max_size,
-                             std::string* output) const;
-
   // WriteJSON calls these.
   virtual void GetParameters(DictionaryValue* params) const OVERRIDE;
 
   virtual void GetCountAndBucketData(Count* count,
                                      ListValue* buckets) const OVERRIDE;
 
   // Does not own this object. Should get from StatisticsRecorder.
   const BucketRanges* bucket_ranges_;
 
   Sample declared_min_;  // Less than this goes into counts_[0]
@@ skipping 145 matching lines @@
   static bool ValidateCustomRanges(const std::vector<Sample>& custom_ranges);
   static BucketRanges* CreateBucketRangesFromCustomRanges(
       const std::vector<Sample>& custom_ranges);
 
   DISALLOW_COPY_AND_ASSIGN(CustomHistogram);
 };
 
 }  // namespace base
 
 #endif  // BASE_METRICS_HISTOGRAM_H_