Use quiche string libraries in third_party/quic/test_tools

gfe-relnote: n/a, no functional change
PiperOrigin-RevId: 285009487
Change-Id: Ib5df01e93b8567c062cac8e5469e1ff86161445f
diff --git a/quic/test_tools/simulator/quic_endpoint_base.cc b/quic/test_tools/simulator/quic_endpoint_base.cc
index 54c3b57..21815d8 100644
--- a/quic/test_tools/simulator/quic_endpoint_base.cc
+++ b/quic/test_tools/simulator/quic_endpoint_base.cc
@@ -11,12 +11,11 @@
 #include "net/third_party/quiche/src/quic/core/crypto/crypto_protocol.h"
 #include "net/third_party/quiche/src/quic/core/quic_connection.h"
 #include "net/third_party/quiche/src/quic/core/quic_data_writer.h"
-#include "net/third_party/quiche/src/quic/platform/api/quic_str_cat.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_test_output.h"
-#include "net/third_party/quiche/src/quic/platform/api/quic_text_utils.h"
 #include "net/third_party/quiche/src/quic/test_tools/quic_connection_peer.h"
 #include "net/third_party/quiche/src/quic/test_tools/quic_test_utils.h"
 #include "net/third_party/quiche/src/quic/test_tools/simulator/simulator.h"
+#include "net/third_party/quiche/src/common/platform/api/quiche_str_cat.h"
 
 namespace quic {
 namespace simulator {
@@ -61,7 +60,7 @@
       peer_name_(peer_name),
       writer_(this),
       nic_tx_queue_(simulator,
-                    QuicStringPrintf("%s (TX Queue)", name.c_str()),
+                    quiche::QuicheStringPrintf("%s (TX Queue)", name.c_str()),
                     kMaxOutgoingPacketSize * kTxQueueSize),
       connection_(nullptr),
       write_blocked_count_(0),
@@ -74,8 +73,8 @@
     const char* perspective_prefix =
         connection_->perspective() == Perspective::IS_CLIENT ? "C" : "S";
 
-    std::string identifier =
-        QuicStrCat(perspective_prefix, connection_->connection_id().ToString());
+    std::string identifier = quiche::QuicheStrCat(
+        perspective_prefix, connection_->connection_id().ToString());
     QuicRecordTrace(identifier, trace_visitor_->trace()->SerializeAsString());
   }
 }