Standardize usage of virtual/override/final specifiers.

net/quic/congestion_control/leaky_bucket_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/leaky_bucket.h"
 #include "net/quic/test_tools/mock_clock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 namespace test {
 
 class LeakyBucketTest : public ::testing::Test {
  protected:
-  virtual void SetUp() {
+  void SetUp() override {
     leaky_bucket_.reset(new LeakyBucket(QuicBandwidth::Zero()));
   }
   MockClock clock_;
   scoped_ptr<LeakyBucket> leaky_bucket_;
 };
 
 TEST_F(LeakyBucketTest, Basic) {
   QuicBandwidth draining_rate = QuicBandwidth::FromBytesPerSecond(200000);
   leaky_bucket_->SetDrainingRate(clock_.Now(), draining_rate);
   leaky_bucket_->Add(clock_.Now(), 2000);
@@ skipping 39 matching lines @@
             leaky_bucket_->TimeRemaining(clock_.Now()));
   draining_rate = draining_rate.Scale(0.5f);  // Cut drain rate in half.
   leaky_bucket_->SetDrainingRate(clock_.Now(), draining_rate);
   EXPECT_EQ(1000u, leaky_bucket_->BytesPending(clock_.Now()));
   EXPECT_EQ(QuicTime::Delta::FromMilliseconds(10),
             leaky_bucket_->TimeRemaining(clock_.Now()));
 }
 
 }  // namespace test
 }  // namespace net