adds std:: to stl types (#049)

net/quic/core/quic_crypto_client_stream_test.cc

Index: net/quic/core/quic_crypto_client_stream_test.cc
diff --git a/net/quic/core/quic_crypto_client_stream_test.cc b/net/quic/core/quic_crypto_client_stream_test.cc
index 78fd65033d6449c8ebf2ebb9392f5302633cb628..6c2d0daa81371636cfe4206edad79046f1ca2550 100644
--- a/net/quic/core/quic_crypto_client_stream_test.cc
+++ b/net/quic/core/quic_crypto_client_stream_test.cc
@@ -22,7 +22,6 @@
 #include "testing/gtest/include/gtest/gtest.h"
 
 using std::string;
-using std::vector;
 
 using testing::_;
 
@@ -171,7 +170,7 @@ TEST_F(QuicCryptoClientStreamTest, InvalidCachedServerConfig) {
   QuicCryptoClientConfig::CachedState* state =
       crypto_config_.LookupOrCreate(server_id_);
 
-  vector<string> certs = state->certs();
+  std::vector<string> certs = state->certs();
   string cert_sct = state->cert_sct();
   string signature = state->signature();
   string chlo_hash = state->chlo_hash();