Standardize usage of virtual/override/final specifiers.

components/metrics/metrics_reporting_scheduler_unittest.cc

 // Copyright 2014 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 "components/metrics/metrics_reporting_scheduler.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace metrics {
 
 class MetricsReportingSchedulerTest : public testing::Test {
  public:
   MetricsReportingSchedulerTest() : callback_call_count_(0) {}
-  virtual ~MetricsReportingSchedulerTest() {}
+  ~MetricsReportingSchedulerTest() override {}
 
   base::Closure GetCallback() {
     return base::Bind(&MetricsReportingSchedulerTest::SchedulerCallback,
                       base::Unretained(this));
   }
 
   int callback_call_count() const { return callback_call_count_; }
 
  private:
   void SchedulerCallback() {
@@ skipping 24 matching lines @@
   scheduler.SetUploadIntervalForTesting(base::TimeDelta());
   scheduler.Start();
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(0, callback_call_count());
 
   scheduler.InitTaskComplete();
   EXPECT_EQ(1, callback_call_count());
 }
 
 }  // namespace metrics