Standardize usage of virtual/override/final specifiers.

media/cast/sender/video_sender_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 <stdint.h>
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 137 matching lines @@
         testing_clock_,
         dummy_endpoint,
         make_scoped_ptr(new base::DictionaryValue),
         base::Bind(&UpdateCastTransportStatus),
         BulkRawEventsCallback(),
         base::TimeDelta(),
         task_runner_,
         &transport_));
   }
 
-  virtual ~VideoSenderTest() {}
+  ~VideoSenderTest() override {}
 
-  virtual void TearDown() override {
+  void TearDown() override {
     video_sender_.reset();
     task_runner_->RunTasks();
   }
 
   static void UpdateCastTransportStatus(CastTransportStatus status) {
     EXPECT_EQ(TRANSPORT_VIDEO_INITIALIZED, status);
   }
 
   // If |external| is true then external video encoder (VEA) is used.
   // |expect_init_sucess| is true if initialization is expected to succeed.
@@ skipping 360 matching lines @@
   cast_feedback.ack_frame_id = 0;
   video_sender_->OnReceivedCastFeedback(cast_feedback);
 
   transport_.SetPause(false);
   RunTasks(33);
   EXPECT_EQ(0, transport_.number_of_rtp_packets());
 }
 
 }  // namespace cast
 }  // namespace media