Standardize usage of virtual/override/final specifiers.

net/http/http_response_body_drainer_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 "net/http/http_response_body_drainer.h"
 
 #include <cstring>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 195 matching lines @@
  protected:
   HttpResponseBodyDrainerTest()
       : proxy_service_(ProxyService::CreateDirect()),
         ssl_config_service_(new SSLConfigServiceDefaults),
         http_server_properties_(new HttpServerPropertiesImpl()),
         transport_security_state_(new TransportSecurityState()),
         session_(CreateNetworkSession()),
         mock_stream_(new MockHttpStream(&result_waiter_)),
         drainer_(new HttpResponseBodyDrainer(mock_stream_)) {}
 
-  virtual ~HttpResponseBodyDrainerTest() {}
+  ~HttpResponseBodyDrainerTest() override {}
 
   HttpNetworkSession* CreateNetworkSession() const {
     HttpNetworkSession::Params params;
     params.proxy_service = proxy_service_.get();
     params.ssl_config_service = ssl_config_service_.get();
     params.http_server_properties = http_server_properties_->GetWeakPtr();
     params.transport_security_state = transport_security_state_.get();
     return new HttpNetworkSession(params);
   }
 
@@ skipping 72 matching lines @@
   too_many_chunks += 1;  // Now it's too large.
 
   mock_stream_->set_num_chunks(too_many_chunks);
   drainer_->Start(session_.get());
   EXPECT_TRUE(result_waiter_.WaitForResult());
 }
 
 }  // namespace
 
 }  // namespace net