Standardize usage of virtual/override/final specifiers.

media/cast/net/rtp/cast_message_builder_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 "base/memory/scoped_ptr.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "media/cast/net/rtcp/rtcp.h"
 #include "media/cast/net/rtp/cast_message_builder.h"
@@ skipping 82 matching lines @@
                                                  &framer_,
                                                  kSsrc,
                                                  true,
                                                  0)) {
     rtp_header_.sender_ssrc = kSsrc;
     rtp_header_.is_key_frame = false;
     testing_clock_.Advance(
         base::TimeDelta::FromMilliseconds(kStartMillisecond));
   }
 
-  virtual ~CastMessageBuilderTest() {}
+  ~CastMessageBuilderTest() override {}
 
   void SetFrameIds(uint32 frame_id, uint32 reference_frame_id) {
     rtp_header_.frame_id = frame_id;
     rtp_header_.reference_frame_id = reference_frame_id;
   }
 
   void SetPacketId(uint16 packet_id) { rtp_header_.packet_id = packet_id; }
 
   void SetMaxPacketId(uint16 max_packet_id) {
     rtp_header_.max_packet_id = max_packet_id;
@@ skipping 313 matching lines @@
   SetFrameIds(frame_id, frame_id - 1);
   InsertPacket();
   testing_clock_.Advance(
       base::TimeDelta::FromMilliseconds(kShortTimeIncrementMs));
   EXPECT_TRUE(feedback_.triggered());
   EXPECT_EQ(frame_id, feedback_.last_frame_acked());
 }
 
 }  // namespace cast
 }  // namespace media