Replace QuicheTextUtils methods with absl::SimpleAtoi.

PiperOrigin-RevId: 339269770
Change-Id: I5a032260e18aa9f2ea23ffd4ff6bd6d8d28d77fc
diff --git a/common/quiche_data_reader.cc b/common/quiche_data_reader.cc
index 395d5c0..bbb4b87 100644
--- a/common/quiche_data_reader.cc
+++ b/common/quiche_data_reader.cc
@@ -6,6 +6,7 @@
 
 #include <cstring>
 
+#include "absl/strings/numbers.h"
 #include "absl/strings/string_view.h"
 #include "net/third_party/quiche/src/common/platform/api/quiche_logging.h"
 #include "net/third_party/quiche/src/common/platform/api/quiche_str_cat.h"
@@ -125,7 +126,7 @@
     return false;
   }
 
-  return QuicheTextUtils::StringToUint64(digits, result);
+  return absl::SimpleAtoi(digits, result);
 }
 
 absl::string_view QuicheDataReader::ReadRemainingPayload() {