Remove using namespace in net/quic/quic_stream_sequencer.h

net/tools/quic/quic_server_session_test.cc

Index: net/tools/quic/quic_server_session_test.cc
diff --git a/net/tools/quic/quic_server_session_test.cc b/net/tools/quic/quic_server_session_test.cc
index 4705c05aa0145d34e00f2e222173d420759bfae9..d1737bb430672cbdea5b0311ff86fe80489d0f6a 100644
--- a/net/tools/quic/quic_server_session_test.cc
+++ b/net/tools/quic/quic_server_session_test.cc
@@ -4,6 +4,8 @@
 
 #include "net/tools/quic/quic_server_session.h"
 
+#include <string>
+
 #include "net/quic/crypto/cached_network_parameters.h"
 #include "net/quic/crypto/quic_crypto_server_config.h"
 #include "net/quic/crypto/quic_random.h"
@@ -310,7 +312,7 @@ TEST_P(QuicServerSessionTest, BandwidthEstimates) {
   int32 bandwidth_estimate_kbytes_per_second = 123;
   int32 max_bandwidth_estimate_kbytes_per_second = 134;
   int32 max_bandwidth_estimate_timestamp = 1122334455;
-  const string serving_region = "not a real region";
+  const std::string serving_region = "not a real region";
   session_->set_serving_region(serving_region);
 
   MockQuicCryptoServerStream* crypto_stream =
@@ -394,7 +396,7 @@ TEST_P(QuicServerSessionTest, BandwidthResumptionExperiment) {
   copt.push_back(kBWRE);
   QuicConfigPeer::SetReceivedConnectionOptions(session_->config(), copt);
 
-  const string kTestServingRegion = "a serving region";
+  const std::string kTestServingRegion = "a serving region";
   session_->set_serving_region(kTestServingRegion);
 
   QuicCryptoServerStream* crypto_stream =