Standardize usage of virtual/override/final specifiers.

media/cast/net/rtp/receiver_stats_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 <gtest/gtest.h>
 
 #include <stdint.h>
 
 #include "base/test/simple_test_tick_clock.h"
 #include "base/time/time.h"
@@ skipping 12 matching lines @@
       : stats_(&testing_clock_),
         fraction_lost_(0),
         cumulative_lost_(0),
         extended_high_sequence_number_(0),
         jitter_(0) {
     testing_clock_.Advance(
         base::TimeDelta::FromMilliseconds(kStartMillisecond));
     start_time_ = testing_clock_.NowTicks();
     delta_increments_ = base::TimeDelta::FromMilliseconds(kStdTimeIncrementMs);
   }
-  virtual ~ReceiverStatsTest() {}
+  ~ReceiverStatsTest() override {}
 
   uint32 ExpectedJitter(uint32 const_interval, int num_packets) {
     float jitter = 0;
     // Assume timestamps have a constant kStdTimeIncrementMs interval.
     float float_interval =
         static_cast<float>(const_interval - kStdTimeIncrementMs);
     for (int i = 0; i < num_packets; ++i) {
       jitter += (float_interval - jitter) / 16;
     }
     return static_cast<uint32>(jitter + 0.5f);
@@ skipping 125 matching lines @@
   EXPECT_FALSE(cumulative_lost_);
   // Build extended sequence number (one wrap cycle).
   const uint32 extended_seq_num = rtp_header_.sequence_number - 1;
   EXPECT_EQ(extended_seq_num, extended_high_sequence_number_);
   EXPECT_EQ(ExpectedJitter(kStdTimeIncrementMs + kAdditionalIncrement, 300),
             jitter_);
 }
 
 }  // namespace cast
 }  // namespace media