Standardize usage of virtual/override/final in net/

net/quic/reliable_quic_stream_test.cc

Index: net/quic/reliable_quic_stream_test.cc
diff --git a/net/quic/reliable_quic_stream_test.cc b/net/quic/reliable_quic_stream_test.cc
index 713d0e35251e015487acb2ac84ce8b3be5b05a2b..d63a5d824bc6e8c7bfe424e1825c404fc48a3c0d 100644
--- a/net/quic/reliable_quic_stream_test.cc
+++ b/net/quic/reliable_quic_stream_test.cc
@@ -48,14 +48,14 @@ class TestStream : public ReliableQuicStream {
       : ReliableQuicStream(id, session),
         should_process_data_(should_process_data) {}
 
-  virtual uint32 ProcessRawData(const char* data, uint32 data_len) override {
+  uint32 ProcessRawData(const char* data, uint32 data_len) override {
     EXPECT_NE(0u, data_len);
     DVLOG(1) << "ProcessData data_len: " << data_len;
     data_ += string(data, data_len);
     return should_process_data_ ? data_len : 0;
   }
 
-  virtual QuicPriority EffectivePriority() const override {
+  QuicPriority EffectivePriority() const override {
     return QuicUtils::HighestPriority();
   }