Remove using namespace in net/quic/quic_stream_sequencer.h

net/quic/quic_session_test.cc

Index: net/quic/quic_session_test.cc
diff --git a/net/quic/quic_session_test.cc b/net/quic/quic_session_test.cc
index d953678f1041c05631d4110a2a0a25d7c612fa74..c9e41d1864bd34184c236e537d8178866fee3cd8 100644
--- a/net/quic/quic_session_test.cc
+++ b/net/quic/quic_session_test.cc
@@ -5,6 +5,7 @@
 #include "net/quic/quic_session.h"
 
 #include <set>
+#include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ -33,6 +34,7 @@
 
 using base::hash_map;
 using std::set;
+using std::string;
 using std::vector;
 using testing::CreateFunctor;
 using testing::InSequence;