Standardize usage of virtual/override/final specifiers.

net/quic/congestion_control/tcp_receiver_test.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/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/quic/congestion_control/tcp_receiver.h"
 #include "net/quic/test_tools/mock_clock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 namespace test {
 
 class QuicTcpReceiverTest : public ::testing::Test {
  protected:
-  virtual void SetUp() {
-    receiver_.reset(new TcpReceiver());
-  }
+  void SetUp() override { receiver_.reset(new TcpReceiver()); }
   scoped_ptr<TcpReceiver> receiver_;
 };
 
 TEST_F(QuicTcpReceiverTest, SimpleReceiver) {
   QuicCongestionFeedbackFrame feedback;
   QuicTime timestamp(QuicTime::Zero());
   receiver_->RecordIncomingPacket(1, 1, timestamp);
   ASSERT_TRUE(receiver_->GenerateCongestionFeedback(&feedback));
   EXPECT_EQ(kTCP, feedback.type);
   EXPECT_EQ(256000u, feedback.tcp.receive_window);
   receiver_->RecordIncomingPacket(1, 2, timestamp);
   ASSERT_TRUE(receiver_->GenerateCongestionFeedback(&feedback));
   EXPECT_EQ(kTCP, feedback.type);
   EXPECT_EQ(256000u, feedback.tcp.receive_window);
 }
 
 }  // namespace test
 }  // namespace net