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

base/metrics/histogram_snapshot_manager_unittest.cc

Index: base/metrics/histogram_snapshot_manager_unittest.cc
diff --git a/base/metrics/histogram_snapshot_manager_unittest.cc b/base/metrics/histogram_snapshot_manager_unittest.cc
index e6672ea7eb241906ff017e2f9cdc4c745ad0dc81..5dd72a7f1ce2c88546e0ce21ef3035394b83142b 100644
--- a/base/metrics/histogram_snapshot_manager_unittest.cc
+++ b/base/metrics/histogram_snapshot_manager_unittest.cc
@@ -18,22 +18,21 @@ class HistogramFlattenerDeltaRecorder : public HistogramFlattener {
  public:
   HistogramFlattenerDeltaRecorder() {}
 
-  virtual void RecordDelta(const HistogramBase& histogram,
-                           const HistogramSamples& snapshot) OVERRIDE {
+  void RecordDelta(const HistogramBase& histogram,
+                   const HistogramSamples& snapshot) override {
     recorded_delta_histogram_names_.push_back(histogram.histogram_name());
   }
 
-  virtual void InconsistencyDetected(
-      HistogramBase::Inconsistency problem) OVERRIDE {
+  void InconsistencyDetected(HistogramBase::Inconsistency problem) override {
     ASSERT_TRUE(false);
   }
 
-  virtual void UniqueInconsistencyDetected(
-      HistogramBase::Inconsistency problem) OVERRIDE {
+  void UniqueInconsistencyDetected(
+      HistogramBase::Inconsistency problem) override {
     ASSERT_TRUE(false);
   }
 
-  virtual void InconsistencyDetectedInLoggedCount(int amount) OVERRIDE {
+  void InconsistencyDetectedInLoggedCount(int amount) override {
     ASSERT_TRUE(false);
   }