Add a new QUIC platform API for text utilities.

net/tools/quic/stateless_rejector_test.cc

Index: net/tools/quic/stateless_rejector_test.cc
diff --git a/net/tools/quic/stateless_rejector_test.cc b/net/tools/quic/stateless_rejector_test.cc
index 9ecef237a5c16c45b022bcc908a68731f96dc4d2..c2ab54c49f53dd9dd630005f381908153601a9d0 100644
--- a/net/tools/quic/stateless_rejector_test.cc
+++ b/net/tools/quic/stateless_rejector_test.cc
@@ -8,11 +8,11 @@
 #include <vector>
 
 #include "base/memory/ptr_util.h"
-#include "base/strings/stringprintf.h"
 #include "net/quic/core/crypto/crypto_handshake_message.h"
 #include "net/quic/core/crypto/proof_source.h"
 #include "net/quic/core/quic_utils.h"
 #include "net/quic/platform/api/quic_str_cat.h"
+#include "net/quic/platform/api/quic_text_utils.h"
 #include "net/quic/test_tools/crypto_test_utils.h"
 #include "net/quic/test_tools/quic_crypto_server_config_peer.h"
 #include "net/quic/test_tools/quic_test_utils.h"
@@ -100,7 +100,8 @@ class StatelessRejectorTest : public ::testing::TestWithParam<TestParams> {
         QuicRandom::GetInstance(), &clock_, config_options_));
 
     // Save the server config.
-    scid_hex_ = "#" + QuicUtils::HexEncode(config_peer_.GetPrimaryConfig()->id);
+    scid_hex_ =
+        "#" + QuicTextUtils::HexEncode(config_peer_.GetPrimaryConfig()->id);
 
     // Encode the QUIC version.
     ver_hex_ = QuicTagToString(QuicVersionToQuicTag(GetParam().version));
@@ -108,7 +109,8 @@ class StatelessRejectorTest : public ::testing::TestWithParam<TestParams> {
     // Generate a public value.
     char public_value[32];
     memset(public_value, 42, sizeof(public_value));
-    pubs_hex_ = "#" + QuicUtils::HexEncode(public_value, sizeof(public_value));
+    pubs_hex_ =
+        "#" + QuicTextUtils::HexEncode(public_value, sizeof(public_value));
 
     // Generate a client nonce.
     string nonce;
@@ -118,7 +120,7 @@ class StatelessRejectorTest : public ::testing::TestWithParam<TestParams> {
             reinterpret_cast<char*>(config_peer_.GetPrimaryConfig()->orbit),
             kOrbitSize),
         &nonce);
-    nonc_hex_ = "#" + QuicUtils::HexEncode(nonce);
+    nonc_hex_ = "#" + QuicTextUtils::HexEncode(nonce);
 
     // Generate a source address token.
     SourceAddressTokens previous_tokens;
@@ -127,7 +129,7 @@ class StatelessRejectorTest : public ::testing::TestWithParam<TestParams> {
     string stk = config_peer_.NewSourceAddressToken(
         config_peer_.GetPrimaryConfig()->id, previous_tokens, ip, &rand,
         clock_.WallNow(), nullptr);
-    stk_hex_ = "#" + QuicUtils::HexEncode(stk);
+    stk_hex_ = "#" + QuicTextUtils::HexEncode(stk);
   }
 
  protected:
@@ -253,8 +255,8 @@ TEST_P(StatelessRejectorTest, RejectChlo) {
 TEST_P(StatelessRejectorTest, AcceptChlo) {
   const uint64_t xlct = CryptoTestUtils::LeafCertHashForTesting();
   const string xlct_hex =
-      "#" +
-      QuicUtils::HexEncode(reinterpret_cast<const char*>(&xlct), sizeof(xlct));
+      "#" + QuicTextUtils::HexEncode(reinterpret_cast<const char*>(&xlct),
+                                     sizeof(xlct));
   // clang-format off
   const CryptoHandshakeMessage client_hello = CryptoTestUtils::Message(
       "CHLO",