Move enums from QuicProtocol to QuicTypes. No behavior change.

net/quic/core/quic_protocol.cc

Index: net/quic/core/quic_protocol.cc
diff --git a/net/quic/core/quic_protocol.cc b/net/quic/core/quic_protocol.cc
index d4502ac39dbe6baafd4e724dc770b1b0887010fe..eadd8102beccddd6e2c9c5e4b52386c11aaeef65 100644
--- a/net/quic/core/quic_protocol.cc
+++ b/net/quic/core/quic_protocol.cc
@@ -166,15 +166,6 @@ bool ContainsQuicTag(const QuicTagVector& tag_vector, QuicTag tag) {
          tag_vector.end();
 }
 
-ostream& operator<<(ostream& os, const Perspective& s) {
-  if (s == Perspective::IS_SERVER) {
-    os << "IS_SERVER";
-  } else {
-    os << "IS_CLIENT";
-  }
-  return os;
-}
-
 ostream& operator<<(ostream& os, const QuicPacketHeader& header) {
   os << "{ connection_id: " << header.public_header.connection_id
      << ", connection_id_length: " << header.public_header.connection_id_length