Move PacketTimeVector typedef to quic_types.h. No behavior change.

net/quic/core/quic_packets.h

Index: net/quic/core/quic_packets.h
diff --git a/net/quic/core/quic_packets.h b/net/quic/core/quic_packets.h
index d85123b6fcee3ffc27b28be720790a67cbbf5104..bb1720a4968c3854950d05d82a203d22276d2153 100644
--- a/net/quic/core/quic_packets.h
+++ b/net/quic/core/quic_packets.h
@@ -106,8 +106,6 @@ struct NET_EXPORT_PRIVATE QuicPublicResetPacket {
 
 typedef QuicPacketPublicHeader QuicVersionNegotiationPacket;
 
-typedef std::vector<std::pair<QuicPacketNumber, QuicTime>> PacketTimeVector;
-
 class NET_EXPORT_PRIVATE QuicData {
  public:
   QuicData(const char* buffer, size_t length);