Standardize usage of virtual/override/final specifiers in base/.

base/threading/watchdog_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/threading/watchdog.h"
 
 #include "base/logging.h"
 #include "base/synchronization/spin_wait.h"
 #include "base/threading/platform_thread.h"
 #include "base/time/time.h"
@@ skipping 25 matching lines @@
   int alarm_counter() { return alarm_counter_; }
 
  private:
   int alarm_counter_;
 
   DISALLOW_COPY_AND_ASSIGN(WatchdogCounter);
 };
 
 class WatchdogTest : public testing::Test {
  public:
-  virtual void SetUp() override {
-    Watchdog::ResetStaticData();
-  }
+  void SetUp() override { Watchdog::ResetStaticData(); }
 };
 
 }  // namespace
 
 //------------------------------------------------------------------------------
 // Actual tests
 
 // Minimal constructor/destructor test.
 TEST_F(WatchdogTest, StartupShutdownTest) {
   Watchdog watchdog1(TimeDelta::FromMilliseconds(300), "Disabled", false);
@@ skipping 74 matching lines @@
   // Set a time greater than the timeout into the past.
   watchdog.ArmSomeTimeDeltaAgo(TimeDelta::FromSeconds(10));
   // It should almost instantly go off, but certainly in less than 5 minutes.
   SPIN_FOR_TIMEDELTA_OR_UNTIL_TRUE(TimeDelta::FromMinutes(5),
                                    watchdog.alarm_counter() > 0);
 
   EXPECT_EQ(1, watchdog.alarm_counter());
 }
 
 }  // namespace base