Remove various 'using std::' statements from QUIC code and use

net/quic/core/frames/quic_goaway_frame.cc

Index: net/quic/core/frames/quic_goaway_frame.cc
diff --git a/net/quic/core/frames/quic_goaway_frame.cc b/net/quic/core/frames/quic_goaway_frame.cc
index ded85b96d01c19bc86525f745c65106577a3c453..2405fbae47e4b52cf545f8e379c1efeb95ed1936 100644
--- a/net/quic/core/frames/quic_goaway_frame.cc
+++ b/net/quic/core/frames/quic_goaway_frame.cc
@@ -4,7 +4,6 @@
 
 #include "net/quic/core/frames/quic_goaway_frame.h"
 
-using std::ostream;
 using std::string;
 
 namespace net {
@@ -19,7 +18,8 @@ QuicGoAwayFrame::QuicGoAwayFrame(QuicErrorCode error_code,
       last_good_stream_id(last_good_stream_id),
       reason_phrase(reason) {}
 
-ostream& operator<<(ostream& os, const QuicGoAwayFrame& goaway_frame) {
+std::ostream& operator<<(std::ostream& os,
+                         const QuicGoAwayFrame& goaway_frame) {
   os << "{ error_code: " << goaway_frame.error_code
      << ", last_good_stream_id: " << goaway_frame.last_good_stream_id
      << ", reason_phrase: '" << goaway_frame.reason_phrase << "' }\n";