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

base/metrics/sample_vector.h

Index: base/metrics/sample_vector.h
diff --git a/base/metrics/sample_vector.h b/base/metrics/sample_vector.h
index 6b2adcf2094a55c6bd4a1a1f93f12a8a489a3546..3e7e2e58276bb9a47812f4d9be4561330dacc623 100644
--- a/base/metrics/sample_vector.h
+++ b/base/metrics/sample_vector.h
@@ -26,20 +26,19 @@ class BASE_EXPORT_PRIVATE SampleVector : public HistogramSamples {
   virtual ~SampleVector();
 
   // 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;
 
   // Get count of a specific bucket.
   HistogramBase::Count GetCountAtIndex(size_t bucket_index) const;
 
  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.
 
   virtual size_t GetBucketIndex(HistogramBase::Sample value) const;
 
@@ -61,14 +60,14 @@ class BASE_EXPORT_PRIVATE SampleVectorIterator : public SampleCountIterator {
   virtual ~SampleVectorIterator();
 
   // 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;
 
   // SampleVector uses predefined buckets, so iterator can return bucket index.
-  virtual bool GetBucketIndex(size_t* index) const OVERRIDE;
+  bool GetBucketIndex(size_t* index) const override;
 
  private:
   void SkipEmptyBuckets();