Standardize usage of virtual/override/final specifiers.

extensions/browser/api/cast_channel/cast_transport_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 "extensions/browser/api/cast_channel/cast_transport.h"
 
 #include <stddef.h>
 #include <queue>
 
 #include "base/test/simple_test_tick_clock.h"
@@ skipping 162 matching lines @@
 };
 
 class CastTransportTest : public testing::Test {
  public:
   CastTransportTest()
       : logger_(new Logger(
             scoped_ptr<base::TickClock>(new base::SimpleTestTickClock),
             base::TimeTicks())) {
     transport_.reset(new CastTransport(&mock_socket_, &delegate_, logger_));
   }
-  virtual ~CastTransportTest() {}
+  ~CastTransportTest() override {}
 
  protected:
   MockCastTransportDelegate delegate_;
   MockCastSocket mock_socket_;
   scoped_refptr<Logger> logger_;
   scoped_ptr<CastTransport> transport_;
 };
 
 // ----------------------------------------------------------------------------
 // Asynchronous write tests
@@ skipping 460 matching lines @@
                              MessageFramer::MessageHeader::header_size())))
       .RetiresOnSaturation();
   EXPECT_CALL(delegate_,
               OnError(&mock_socket_, CHANNEL_ERROR_INVALID_MESSAGE, _));
   EXPECT_CALL(mock_socket_, CloseWithError(CHANNEL_ERROR_INVALID_MESSAGE));
   transport_->StartReadLoop();
 }
 }  // namespace cast_channel
 }  // namespace core_api
 }  // namespace extensions