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_connection.h b/quic/core/quic_connection.h
index ca4e9ca..9c5810a 100644
--- a/quic/core/quic_connection.h
+++ b/quic/core/quic_connection.h
@@ -46,7 +46,8 @@
 #include "net/third_party/quiche/src/quic/platform/api/quic_containers.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_export.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_socket_address.h"
-#include "net/third_party/quiche/src/quic/platform/api/quic_string_piece.h"
+#include "net/third_party/quiche/src/common/platform/api/quiche_str_cat.h"
+#include "net/third_party/quiche/src/common/platform/api/quiche_string_piece.h"
 
 namespace quic {
 
@@ -86,7 +87,7 @@
   virtual void OnGoAway(const QuicGoAwayFrame& frame) = 0;
 
   // Called when |message| has been received.
-  virtual void OnMessageReceived(QuicStringPiece message) = 0;
+  virtual void OnMessageReceived(quiche::QuicheStringPiece message) = 0;
 
   // Called when a MAX_STREAMS frame has been received from the peer.
   virtual bool OnMaxStreamsFrame(const QuicMaxStreamsFrame& frame) = 0;
@@ -480,7 +481,7 @@
       const QuicVersionNegotiationPacket& packet) override;
   void OnRetryPacket(QuicConnectionId original_connection_id,
                      QuicConnectionId new_connection_id,
-                     QuicStringPiece retry_token) override;
+                     quiche::QuicheStringPiece retry_token) override;
   bool OnUnauthenticatedPublicHeader(const QuicPacketHeader& header) override;
   bool OnUnauthenticatedHeader(const QuicPacketHeader& header) override;
   void OnDecryptedPacket(EncryptionLevel level) override;
@@ -782,7 +783,7 @@
   QuicConnectionHelperInterface* helper() { return helper_; }
   QuicAlarmFactory* alarm_factory() { return alarm_factory_; }
 
-  QuicStringPiece GetCurrentPacket();
+  quiche::QuicheStringPiece GetCurrentPacket();
 
   const QuicFramer& framer() const { return framer_; }
 
@@ -996,7 +997,7 @@
     ~BufferedPacket();
 
     // encrypted_buffer is owned by buffered packet.
-    QuicStringPiece encrypted_buffer;
+    quiche::QuicheStringPiece encrypted_buffer;
     // Self and peer addresses when the packet is serialized.
     const QuicSocketAddress self_address;
     const QuicSocketAddress peer_address;