Remove using namespace in net/quic/quic_stream_sequencer.h

net/quic/crypto/aes_128_gcm_12_decrypter_test.cc

Index: net/quic/crypto/aes_128_gcm_12_decrypter_test.cc
diff --git a/net/quic/crypto/aes_128_gcm_12_decrypter_test.cc b/net/quic/crypto/aes_128_gcm_12_decrypter_test.cc
index 37ee8f99855f00c5d184c616d2955c95450aa29b..ddf2cbd16fd2ee95c3e27f2bc58a8250e8ad510e 100644
--- a/net/quic/crypto/aes_128_gcm_12_decrypter_test.cc
+++ b/net/quic/crypto/aes_128_gcm_12_decrypter_test.cc
@@ -4,6 +4,8 @@
 
 #include "net/quic/crypto/aes_128_gcm_12_decrypter.h"
 
+#include <string>
+
 #include "net/quic/test_tools/quic_test_utils.h"
 
 using base::StringPiece;
@@ -277,12 +279,12 @@ TEST(Aes128Gcm12DecrypterTest, Decrypt) {
       bool has_pt = test_vectors[j].pt;
 
       // Decode the test vector.
-      string key;
-      string iv;
-      string ct;
-      string aad;
-      string tag;
-      string pt;
+      std::string key;
+      std::string iv;
+      std::string ct;
+      std::string aad;
+      std::string tag;
+      std::string pt;
       ASSERT_TRUE(DecodeHexString(test_vectors[j].key, &key));
       ASSERT_TRUE(DecodeHexString(test_vectors[j].iv, &iv));
       ASSERT_TRUE(DecodeHexString(test_vectors[j].ct, &ct));
@@ -308,7 +310,7 @@ TEST(Aes128Gcm12DecrypterTest, Decrypt) {
       ASSERT_LE(static_cast<size_t>(Aes128Gcm12Decrypter::kAuthTagSize),
                 tag.length());
       tag.resize(Aes128Gcm12Decrypter::kAuthTagSize);
-      string ciphertext = ct + tag;
+      std::string ciphertext = ct + tag;
 
       Aes128Gcm12Decrypter decrypter;
       ASSERT_TRUE(decrypter.SetKey(key));