Standardize usage of virtual/override/final in media/

media/cast/net/rtp/rtp_packetizer_unittest.cc

Index: media/cast/net/rtp/rtp_packetizer_unittest.cc
diff --git a/media/cast/net/rtp/rtp_packetizer_unittest.cc b/media/cast/net/rtp/rtp_packetizer_unittest.cc
index 4a3ea846c2e7145383bd1d4f66c51c50ccaec90b..aa1b4c59b2143dc98483c9d7bc8ad6a41087b75d 100644
--- a/media/cast/net/rtp/rtp_packetizer_unittest.cc
+++ b/media/cast/net/rtp/rtp_packetizer_unittest.cc
@@ -61,7 +61,7 @@ class TestRtpPacketTransport : public PacketSender {
     EXPECT_EQ(expected_frame_id_ - 1u, rtp_header.reference_frame_id);
   }
 
-  virtual bool SendPacket(PacketRef packet, const base::Closure& cb) override {
+  bool SendPacket(PacketRef packet, const base::Closure& cb) override {
     ++packets_sent_;
     RtpHeaderParser parser(&packet->data[0], packet->data.size());
     RtpCastTestHeader rtp_header;
@@ -72,9 +72,7 @@ class TestRtpPacketTransport : public PacketSender {
     return true;
   }
 
-  virtual int64 GetBytesSent() override {
-    return 0;
-  }
+  int64 GetBytesSent() override { return 0; }
 
   size_t number_of_packets_received() const { return packets_sent_; }