replace OVERRIDE and FINAL with override and final in base/

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..2da22be931eee81dc5a05b3180211bce0048e840 100644
--- a/base/metrics/histogram_snapshot_manager_unittest.cc
+++ b/base/metrics/histogram_snapshot_manager_unittest.cc
@@ -19,21 +19,21 @@ class HistogramFlattenerDeltaRecorder : public HistogramFlattener {
   HistogramFlattenerDeltaRecorder() {}
 
   virtual void RecordDelta(const HistogramBase& histogram,
-                           const HistogramSamples& snapshot) OVERRIDE {
+                           const HistogramSamples& snapshot) override {
     recorded_delta_histogram_names_.push_back(histogram.histogram_name());
   }
 
   virtual void InconsistencyDetected(
-      HistogramBase::Inconsistency problem) OVERRIDE {
+      HistogramBase::Inconsistency problem) override {
     ASSERT_TRUE(false);
   }
 
   virtual void UniqueInconsistencyDetected(
-      HistogramBase::Inconsistency problem) OVERRIDE {
+      HistogramBase::Inconsistency problem) override {
     ASSERT_TRUE(false);
   }
 
-  virtual void InconsistencyDetectedInLoggedCount(int amount) OVERRIDE {
+  virtual void InconsistencyDetectedInLoggedCount(int amount) override {
     ASSERT_TRUE(false);
   }