Use override instead of virtual..override in ./net/quic/... and

net/quic/quic_stream_sequencer_test.cc

 // Copyright (c) 2012 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 "net/quic/quic_stream_sequencer.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 26 matching lines @@
   MockStream(QuicSession* session, QuicStreamId id)
       : ReliableQuicStream(id, session) {
   }
 
   MOCK_METHOD0(OnFinRead, void());
   MOCK_METHOD2(ProcessRawData, uint32(const char* data, uint32 data_len));
   MOCK_METHOD2(CloseConnectionWithDetails, void(QuicErrorCode error,
                                                 const string& details));
   MOCK_METHOD1(Reset, void(QuicRstStreamErrorCode error));
   MOCK_METHOD0(OnCanWrite, void());
-  virtual QuicPriority EffectivePriority() const override {
+  QuicPriority EffectivePriority() const override {
     return QuicUtils::HighestPriority();
   }
   virtual bool IsFlowControlEnabled() const {
     return true;
   }
 };
 
 namespace {
 
 static const char kPayload[] =
@@ skipping 378 matching lines @@
   QuicStreamFrame frame2(kClientDataStreamId1, false, 2, MakeIOVector("hello"));
   EXPECT_TRUE(sequencer_->FrameOverlapsBufferedData(frame2));
   EXPECT_CALL(stream_, CloseConnectionWithDetails(QUIC_INVALID_STREAM_FRAME, _))
       .Times(1);
   sequencer_->OnStreamFrame(frame2);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net