Implement write methods for SparseHistogram

base/metrics/histogram.h

Index: base/metrics/histogram.h
diff --git a/base/metrics/histogram.h b/base/metrics/histogram.h
index fe7b7948328a6d3b18555606bc6168f8221ea876..8d059f928398057321f9e47f5ef64ca99b096fff 100644
--- a/base/metrics/histogram.h
+++ b/base/metrics/histogram.h
@@ -511,15 +511,6 @@ class BASE_EXPORT Histogram : public HistogramBase {
                                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;