Use quiche string libraries in third_party/quic/core

gfe-relnote: n/a, no functional change
PiperOrigin-RevId: 285401547
Change-Id: Ice6d421ff7058fe2d47aee426d7634b6d403ee3f
diff --git a/quic/core/quic_packet_creator.h b/quic/core/quic_packet_creator.h
index eb7b627..96cd5bf 100644
--- a/quic/core/quic_packet_creator.h
+++ b/quic/core/quic_packet_creator.h
@@ -26,6 +26,7 @@
 #include "net/third_party/quiche/src/quic/core/quic_packets.h"
 #include "net/third_party/quiche/src/quic/core/quic_types.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_export.h"
+#include "net/third_party/quiche/src/common/platform/api/quiche_string_piece.h"
 
 namespace quic {
 namespace test {
@@ -286,7 +287,7 @@
   void AddPendingPadding(QuicByteCount size);
 
   // Sets the retry token to be sent over the wire in IETF Initial packets.
-  void SetRetryToken(QuicStringPiece retry_token);
+  void SetRetryToken(quiche::QuicheStringPiece retry_token);
 
   // Consumes retransmittable control |frame|. Returns true if the frame is
   // successfully consumed. Returns false otherwise.
@@ -510,7 +511,7 @@
 
   // Returns the retry token to send over the wire, only sent in
   // v99 IETF Initial packets.
-  QuicStringPiece GetRetryToken() const;
+  quiche::QuicheStringPiece GetRetryToken() const;
 
   // Returns length of the length variable length integer to send over the
   // wire. Is non-zero for v99 IETF Initial, 0-RTT or Handshake packets.