Remove using namespace in net/quic/quic_stream_sequencer.h

net/quic/quic_crypto_client_stream_test.cc

Index: net/quic/quic_crypto_client_stream_test.cc
diff --git a/net/quic/quic_crypto_client_stream_test.cc b/net/quic/quic_crypto_client_stream_test.cc
index 8e14d775154f4924830d872b1b99747c6f57caa2..4ac8f62b3e47a242c7ad6f41135503df73a89034 100644
--- a/net/quic/quic_crypto_client_stream_test.cc
+++ b/net/quic/quic_crypto_client_stream_test.cc
@@ -4,6 +4,8 @@
 
 #include "net/quic/quic_crypto_client_stream.h"
 
+#include <string>
+
 #include "base/memory/scoped_ptr.h"
 #include "net/quic/crypto/aes_128_gcm_12_encrypter.h"
 #include "net/quic/crypto/quic_decrypter.h"
@@ -183,7 +185,7 @@ TEST_F(QuicCryptoClientStreamTest, ServerConfigUpdate) {
   // Make sure that the STK and SCFG are cached correctly.
   EXPECT_EQ("xstk", state->source_address_token());
 
-  string cached_scfg = state->server_config();
+  std::string cached_scfg = state->server_config();
   test::CompareCharArraysWithHexError(
       "scfg", cached_scfg.data(), cached_scfg.length(),
       QuicUtils::AsChars(scfg), arraysize(scfg));