Standardize usage of virtual/override/final specifiers.

chrome/browser/net/network_stats_unittest.cc

Index: chrome/browser/net/network_stats_unittest.cc
diff --git a/chrome/browser/net/network_stats_unittest.cc b/chrome/browser/net/network_stats_unittest.cc
index 331abf63350c37a29a8e3310f390ba981ab55661..cd16a328d1c268da32321d7a4c0a5f88c26c0697 100644
--- a/chrome/browser/net/network_stats_unittest.cc
+++ b/chrome/browser/net/network_stats_unittest.cc
@@ -21,15 +21,14 @@ class NetworkStatsTest : public PlatformTest {
   NetworkStatsTest() {}
 
  protected:
-
-  virtual void SetUp() {
+  void SetUp() override {
     net::NetworkChangeNotifier::NotifyObserversOfIPAddressChangeForTests();
     base::MessageLoop::current()->RunUntilIdle();
     mock_writes_.clear();
     mock_reads_.clear();
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     net::NetworkChangeNotifier::NotifyObserversOfIPAddressChangeForTests();
     // Empty the current queue.
     base::MessageLoop::current()->RunUntilIdle();