Add a new QUIC platform API for text utilities.

net/tools/quic/crypto_message_printer_bin.cc

Index: net/tools/quic/crypto_message_printer_bin.cc
diff --git a/net/tools/quic/crypto_message_printer_bin.cc b/net/tools/quic/crypto_message_printer_bin.cc
index 11eb8f834106ba3ef729033118d83415804d2b1b..d0b46c60e9cdccfbd02e1ff1b950094448471542 100644
--- a/net/tools/quic/crypto_message_printer_bin.cc
+++ b/net/tools/quic/crypto_message_printer_bin.cc
@@ -11,7 +11,7 @@
 
 #include "base/command_line.h"
 #include "net/quic/core/crypto/crypto_framer.h"
-#include "net/quic/core/quic_utils.h"
+#include "net/quic/platform/api/quic_text_utils.h"
 
 using std::cerr;
 using std::cout;
@@ -44,7 +44,7 @@ int main(int argc, char* argv[]) {
   net::CryptoMessagePrinter printer;
   net::CryptoFramer framer;
   framer.set_visitor(&printer);
-  std::string input = net::QuicUtils::HexDecode(argv[1]);
+  std::string input = net::QuicTextUtils::HexDecode(argv[1]);
   if (!framer.ProcessInput(input)) {
     return 1;
   }