Remove using namespace in net/quic/quic_stream_sequencer.h

net/quic/crypto/aes_128_gcm_12_decrypter_test.cc

 // Copyright (c) 2013 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/crypto/aes_128_gcm_12_decrypter.h"
 
+#include <string>
+
 #include "net/quic/test_tools/quic_test_utils.h"
 
 using base::StringPiece;
 
 namespace {
 
 // The AES GCM test vectors come from the file gcmDecrypt128.rsp
 // downloaded from http://csrc.nist.gov/groups/STM/cavp/index.html on
 // 2013-02-01. The test vectors in that file look like this:
 //
@@ skipping 253 matching lines @@
 TEST(Aes128Gcm12DecrypterTest, Decrypt) {
   for (size_t i = 0; i < arraysize(test_group_array); i++) {
     SCOPED_TRACE(i);
     const TestVector* test_vectors = test_group_array[i];
     const TestGroupInfo& test_info = test_group_info[i];
     for (size_t j = 0; test_vectors[j].key != nullptr; j++) {
       // If not present then decryption is expected to fail.
       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));
       ASSERT_TRUE(DecodeHexString(test_vectors[j].aad, &aad));
       ASSERT_TRUE(DecodeHexString(test_vectors[j].tag, &tag));
       if (has_pt) {
         ASSERT_TRUE(DecodeHexString(test_vectors[j].pt, &pt));
       }
 
       // The test vector's lengths should look sane. Note that the lengths
       // in |test_info| are in bits.
       EXPECT_EQ(test_info.key_len, key.length() * 8);
       EXPECT_EQ(test_info.iv_len, iv.length() * 8);
       EXPECT_EQ(test_info.pt_len, ct.length() * 8);
       EXPECT_EQ(test_info.aad_len, aad.length() * 8);
       EXPECT_EQ(test_info.tag_len, tag.length() * 8);
       if (has_pt) {
         EXPECT_EQ(test_info.pt_len, pt.length() * 8);
       }
 
       // The test vectors have 16 byte authenticators but this code only uses
       // the first 12.
       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));
 
       scoped_ptr<QuicData> decrypted(DecryptWithNonce(
           &decrypter, iv,
           // This deliberately tests that the decrypter can handle an AAD that
           // is set to nullptr, as opposed to a zero-length, non-nullptr
           // pointer.
           aad.length() ? aad : StringPiece(), ciphertext));
       if (!decrypted.get()) {
         EXPECT_FALSE(has_pt);
         continue;
       }
       EXPECT_TRUE(has_pt);
 
       ASSERT_EQ(pt.length(), decrypted->length());
       test::CompareCharArraysWithHexError("plaintext", decrypted->data(),
                                           pt.length(), pt.data(), pt.length());
     }
   }
 }
 
 }  // namespace test
 }  // namespace net