replace 'virtual ... OVERRIDE' with '... override'

base/metrics/sample_map.h

Index: base/metrics/sample_map.h
diff --git a/base/metrics/sample_map.h b/base/metrics/sample_map.h
index cdd1138547b6cd179c93ac2b9dfa06ba9f7a5d08..7822074be75731dcb32b435440affa6923a592e4 100644
--- a/base/metrics/sample_map.h
+++ b/base/metrics/sample_map.h
@@ -23,17 +23,16 @@ class BASE_EXPORT_PRIVATE SampleMap : public HistogramSamples {
   virtual ~SampleMap();
 
   // HistogramSamples implementation:
-  virtual void Accumulate(HistogramBase::Sample value,
-                          HistogramBase::Count count) OVERRIDE;
+  void Accumulate(HistogramBase::Sample value,
+                  HistogramBase::Count count) override;
   virtual HistogramBase::Count GetCount(
-      HistogramBase::Sample value) const OVERRIDE;
-  virtual HistogramBase::Count TotalCount() const OVERRIDE;
-  virtual scoped_ptr<SampleCountIterator> Iterator() const OVERRIDE;
+      HistogramBase::Sample value) const override;
+  HistogramBase::Count TotalCount() const override;
+  scoped_ptr<SampleCountIterator> Iterator() const override;
 
  protected:
-  virtual bool AddSubtractImpl(
-      SampleCountIterator* iter,
-      HistogramSamples::Operator op) OVERRIDE;  // |op| is ADD or SUBTRACT.
+  bool AddSubtractImpl(SampleCountIterator* iter, HistogramSamples::Operator op)
+      override;  // |op| is ADD or SUBTRACT.
 
  private:
   std::map<HistogramBase::Sample, HistogramBase::Count> sample_counts_;
@@ -50,11 +49,12 @@ class BASE_EXPORT_PRIVATE SampleMapIterator : public SampleCountIterator {
   virtual ~SampleMapIterator();
 
   // SampleCountIterator implementation:
-  virtual bool Done() const OVERRIDE;
-  virtual void Next() OVERRIDE;
-  virtual void Get(HistogramBase::Sample* min,
-                   HistogramBase::Sample* max,
-                   HistogramBase::Count* count) const OVERRIDE;
+  bool Done() const override;
+  void Next() override;
+  void Get(HistogramBase::Sample* min,
+           HistogramBase::Sample* max,
+           HistogramBase::Count* count) const override;
+
  private:
   SampleToCountMap::const_iterator iter_;
   const SampleToCountMap::const_iterator end_;