Remove using namespace in net/quic/quic_stream_sequencer.h

net/tools/quic/quic_client.h

Index: net/tools/quic/quic_client.h
diff --git a/net/tools/quic/quic_client.h b/net/tools/quic/quic_client.h
index 4111b1a31f0da93294fe130fa6313e6b1fd20632..6a7cb01d0065ca98fe9759fa93de7b5e004ef387 100644
--- a/net/tools/quic/quic_client.h
+++ b/net/tools/quic/quic_client.h
@@ -44,7 +44,7 @@ class QuicClient : public EpollCallbackInterface,
     virtual ~ResponseListener() {}
     virtual void OnCompleteResponse(QuicStreamId id,
                                     const BalsaHeaders& response_headers,
-                                    const string& response_body) = 0;
+                                    const std::string& response_body) = 0;
   };
 
   // Create a quic client, which will have events managed by an externally owned
@@ -142,7 +142,7 @@ class QuicClient : public EpollCallbackInterface,
     server_id_ = server_id;
   }
 
-  void SetUserAgentID(const string& user_agent_id) {
+  void SetUserAgentID(const std::string& user_agent_id) {
     crypto_config_.set_user_agent_id(user_agent_id);
   }