base/ header cleanup. Forward declaration instead of including.

base/histogram.h

 // Copyright (c) 2006-2010 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).
 
 // It supports calls to accumulate either time intervals (which are processed
 // as integral number of milliseconds), or arbitrary integral units.
@@ skipping 301 matching lines @@
   // default underflow bucket.
   static scoped_refptr<Histogram> FactoryGet(const std::string& name,
       Sample minimum, Sample maximum, size_t bucket_count, Flags flags);
   static scoped_refptr<Histogram> FactoryTimeGet(const std::string& name,
       base::TimeDelta minimum, base::TimeDelta maximum, size_t bucket_count,
       Flags flags);
 
   void Add(int value);
 
   // This method is an interface, used only by BooleanHistogram.
-  virtual void AddBoolean(bool value) { DCHECK(false); }
+  virtual void AddBoolean(bool value);
 
   // Accept a TimeDelta to increment.
   void AddTime(base::TimeDelta time) {
     Add(static_cast<int>(time.InMilliseconds()));
   }
 
   void AddSampleSet(const SampleSet& sample);
 
   // This method is an interface, used only by LinearHistogram.
-  virtual void SetRangeDescriptions(const DescriptionPair descriptions[])
-      { DCHECK(false); }
+  virtual void SetRangeDescriptions(const DescriptionPair descriptions[]);
 
   // The following methods provide graphical histogram displays.
   void WriteHTMLGraph(std::string* output) const;
   void WriteAscii(bool graph_it, const std::string& newline,
                   std::string* output) const;
 
   // Support generic flagging of Histograms.
   // 0x1 Currently used to mark this histogram to be recorded by UMA..
   // 0x8000 means print ranges in hex.
   void SetFlags(Flags flags) { flags_ = static_cast<Flags> (flags_ | flags); }
@@ skipping 22 matching lines @@
   const std::string& histogram_name() const { return histogram_name_; }
   Sample declared_min() const { return declared_min_; }
   Sample declared_max() const { return declared_max_; }
   virtual Sample ranges(size_t i) const { return ranges_[i];}
   virtual size_t bucket_count() const { return bucket_count_; }
   // Snapshot the current complete set of sample data.
   // Override with atomic/locked snapshot if needed.
   virtual void SnapshotSample(SampleSet* sample) const;
 
   virtual bool HasConstructorArguments(Sample minimum, Sample maximum,
-      size_t bucket_count) {
-    return ((minimum == declared_min_) && (maximum == declared_max_) &&
-            (bucket_count == bucket_count_));
-  }
+                                       size_t bucket_count);
 
   virtual bool HasConstructorTimeDeltaArguments(base::TimeDelta minimum,
-      base::TimeDelta maximum, size_t bucket_count) {
-    return ((minimum.InMilliseconds() == declared_min_) &&
-            (maximum.InMilliseconds() == declared_max_) &&
-            (bucket_count == bucket_count_));
-  }
+                                                base::TimeDelta maximum,
+                                                size_t bucket_count);
 
  protected:
   friend class base::RefCountedThreadSafe<Histogram>;
   Histogram(const std::string& name, Sample minimum,
             Sample maximum, size_t bucket_count);
   Histogram(const std::string& name, base::TimeDelta minimum,
             base::TimeDelta maximum, size_t bucket_count);
 
   virtual ~Histogram();
 
   // Method to override to skip the display of the i'th bucket if it's empty.
-  virtual bool PrintEmptyBucket(size_t index) const { return true; }
+  virtual bool PrintEmptyBucket(size_t index) const;
 
   //----------------------------------------------------------------------------
   // Methods to override to create histogram with different bucket widths.
   //----------------------------------------------------------------------------
   // Initialize ranges_ mapping.
   virtual void InitializeBucketRange();
   // Find bucket to increment for sample value.
   virtual size_t BucketIndex(Sample value) const;
   // Get normalized size, relative to the ranges_[i].
   virtual double GetBucketSize(Count current, size_t i) const;
@@ skipping 72 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(Histogram);
 };
 
 //------------------------------------------------------------------------------
 
 // LinearHistogram is a more traditional histogram, with evenly spaced
 // buckets.
 class LinearHistogram : public Histogram {
  public:
-  virtual ClassType histogram_type() const { return LINEAR_HISTOGRAM; }
+  virtual ClassType histogram_type() const;
 
   // Store a list of number/text values for use in rendering the histogram.
   // The last element in the array has a null in its "description" slot.
   virtual void SetRangeDescriptions(const DescriptionPair descriptions[]);
 
   /* minimum should start from 1. 0 is as minimum is invalid. 0 is an implicit
      default underflow bucket. */
   static scoped_refptr<Histogram> FactoryGet(const std::string& name,
       Sample minimum, Sample maximum, size_t bucket_count, Flags flags);
   static scoped_refptr<Histogram> FactoryTimeGet(const std::string& name,
@@ skipping 30 matching lines @@
 };
 
 //------------------------------------------------------------------------------
 
 // BooleanHistogram is a histogram for booleans.
 class BooleanHistogram : public LinearHistogram {
  public:
   static scoped_refptr<Histogram> FactoryGet(const std::string& name,
       Flags flags);
 
-  virtual ClassType histogram_type() const { return BOOLEAN_HISTOGRAM; }
+  virtual ClassType histogram_type() const;
 
-  virtual void AddBoolean(bool value) { Add(value ? 1 : 0); }
+  virtual void AddBoolean(bool value);
 
  private:
-  explicit BooleanHistogram(const std::string& name)
-      : LinearHistogram(name, 1, 2, 3) {
-  }
+  explicit BooleanHistogram(const std::string& name);
 
   DISALLOW_COPY_AND_ASSIGN(BooleanHistogram);
 };
 
 //------------------------------------------------------------------------------
 
 // CustomHistogram is a histogram for a set of custom integers.
 class CustomHistogram : public Histogram {
  public:
-  virtual ClassType histogram_type() const { return CUSTOM_HISTOGRAM; }
+  virtual ClassType histogram_type() const;
 
   static scoped_refptr<Histogram> FactoryGet(const std::string& name,
       const std::vector<int>& custom_ranges, Flags flags);
 
  protected:
   CustomHistogram(const std::string& name,
                   const std::vector<int>& custom_ranges);
 
   // Initialize ranges_ mapping.
   virtual void InitializeBucketRange();
@@ skipping 60 matching lines @@
   // lock protects access to the above map.
   static Lock* lock_;
 
   // Dump all known histograms to log.
   static bool dump_on_exit_;
 
   DISALLOW_COPY_AND_ASSIGN(StatisticsRecorder);
 };
 
 #endif  // BASE_HISTOGRAM_H_