Add a new QUIC platform API for text utilities.

net/quic/core/crypto/chacha20_poly1305_decrypter_test.cc

Index: net/quic/core/crypto/chacha20_poly1305_decrypter_test.cc
diff --git a/net/quic/core/crypto/chacha20_poly1305_decrypter_test.cc b/net/quic/core/crypto/chacha20_poly1305_decrypter_test.cc
index 94604cbc442736bae6bfe675444bceaacfca57d8..6caa52fc40c49ed531dbc53205185dab0c7f16ee 100644
--- a/net/quic/core/crypto/chacha20_poly1305_decrypter_test.cc
+++ b/net/quic/core/crypto/chacha20_poly1305_decrypter_test.cc
@@ -7,6 +7,7 @@
 #include <memory>
 
 #include "net/quic/core/quic_utils.h"
+#include "net/quic/platform/api/quic_text_utils.h"
 #include "net/quic/test_tools/quic_test_utils.h"
 
 using base::StringPiece;
@@ -142,14 +143,14 @@ TEST(ChaCha20Poly1305DecrypterTest, Decrypt) {
     bool has_pt = test_vectors[i].pt;
 
     // Decode the test vector.
-    string key = QuicUtils::HexDecode(test_vectors[i].key);
-    string iv = QuicUtils::HexDecode(test_vectors[i].iv);
-    string fixed = QuicUtils::HexDecode(test_vectors[i].fixed);
-    string aad = QuicUtils::HexDecode(test_vectors[i].aad);
-    string ct = QuicUtils::HexDecode(test_vectors[i].ct);
+    string key = QuicTextUtils::HexDecode(test_vectors[i].key);
+    string iv = QuicTextUtils::HexDecode(test_vectors[i].iv);
+    string fixed = QuicTextUtils::HexDecode(test_vectors[i].fixed);
+    string aad = QuicTextUtils::HexDecode(test_vectors[i].aad);
+    string ct = QuicTextUtils::HexDecode(test_vectors[i].ct);
     string pt;
     if (has_pt) {
-      pt = QuicUtils::HexDecode(test_vectors[i].pt);
+      pt = QuicTextUtils::HexDecode(test_vectors[i].pt);
     }
 
     ChaCha20Poly1305Decrypter decrypter;