[Rocksdb] Remove unused double apis to record into histograms

Summary: Statistics.h and histogram.h had double based api's to record values. Remove them as they are not used anywhere

Test Plan: make all check

Reviewers: haobo, dhruba

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D10815

db/db_statistics.h

@@ -39,11 +39,6 @@ class DBStatistics: public Statistics {
     allHistograms_[histogramType].Add(value);
   }
 
-  virtual void measureTime(Histograms histogramType, double value) {
-    assert(histogramType < HISTOGRAM_ENUM_MAX);
-    allHistograms_[histogramType].Add(value);
-  }
-
   virtual void histogramData(Histograms histogramType,
                              HistogramData * const data) {
     assert(histogramType < HISTOGRAM_ENUM_MAX);

include/leveldb/statistics.h

@@ -80,7 +80,6 @@ class Histogram {
   virtual ~Histogram();
   // Add a value to be recorded in the histogram.
   virtual void Add(uint64_t value) = 0;
-  virtual void Add(double value) = 0;
 
   virtual std::string ToString() const = 0;
 
@@ -123,8 +122,7 @@ class Statistics {
 
   virtual long getTickerCount(Tickers tickerType) = 0;
   virtual void recordTick(Tickers tickerType, uint64_t count = 0) = 0;
-  virtual void measureTime(Histograms histogramType, uint64_t count) = 0;
+  virtual void measureTime(Histograms histogramType, uint64_t time) = 0;
-  virtual void measureTime(Histograms histogramType, double count) = 0;
 
   virtual void histogramData(Histograms type, HistogramData * const data) = 0;
 

util/histogram.cc

@@ -85,10 +85,6 @@ void HistogramImpl::Add(uint64_t value) {
   sum_squares_ += (value * value);
 }
 
-void HistogramImpl::Add(double value) {
-  Add(static_cast<uint64_t>(value));
-}
-
 void HistogramImpl::Merge(const HistogramImpl& other) {
   if (other.min_ < min_) min_ = other.min_;
   if (other.max_ > max_) max_ = other.max_;

util/histogram.h

@@ -53,7 +53,6 @@ class HistogramImpl {
   virtual ~HistogramImpl() {}
   virtual void Clear();
   virtual void Add(uint64_t value);
-  virtual void Add(double value);
   void Merge(const HistogramImpl& other);
 
   virtual std::string ToString() const;