Remove using namespace in net/quic/quic_stream_sequencer.h

net/quic/quic_stream_sequencer.h

Index: net/quic/quic_stream_sequencer.h
diff --git a/net/quic/quic_stream_sequencer.h b/net/quic/quic_stream_sequencer.h
index 5da2c0e422e5c3e50d2ea63cf58511cd45916903..6fa84d050509da94bb81679014b1f5bd0bcffe98 100644
--- a/net/quic/quic_stream_sequencer.h
+++ b/net/quic/quic_stream_sequencer.h
@@ -11,9 +11,6 @@
 #include "net/base/iovec.h"
 #include "net/quic/quic_protocol.h"
 
-using std::map;
-using std::string;
-
 namespace net {
 
 namespace test {
@@ -103,7 +100,7 @@ class NET_EXPORT_PRIVATE QuicStreamSequencer {
   // frames, in which case we will have to allow receipt of overlapping frames.
   // Maybe write new frames into a ring buffer, and keep track of consumed
   // bytes, and gaps.
-  typedef map<QuicStreamOffset, string> FrameMap;
+  typedef std::map<QuicStreamOffset, std::string> FrameMap;
 
   // Stores buffered frames (maps from sequence number -> frame data as string).
   FrameMap buffered_frames_;