Remove using namespace in net/quic/quic_stream_sequencer.h

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 <string>
 #include <utility>
 #include <vector>
 
 #include "base/logging.h"
 #include "base/rand_util.h"
 #include "net/base/ip_endpoint.h"
 #include "net/quic/quic_utils.h"
 #include "net/quic/reliable_quic_stream.h"
 #include "net/quic/test_tools/quic_stream_sequencer_peer.h"
 #include "net/quic/test_tools/quic_test_utils.h"
 #include "net/test/gtest_util.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::StringPiece;
 using std::map;
 using std::min;
 using std::pair;
+using std::string;
 using std::vector;
 using testing::_;
 using testing::AnyNumber;
 using testing::InSequence;
 using testing::Return;
 using testing::StrEq;
 
 namespace net {
 namespace test {
 
@@ skipping 401 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