Moves QuicTag typedefs, and QuicTag utility methods to quic_tag.{h,cc}. No behavior change.

net/tools/quic/stateless_rejector_test.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/tools/quic/stateless_rejector.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/memory/ptr_util.h"
@@ skipping 85 matching lines @@
         GetParam().flags == ENABLED || GetParam().flags == STATELESS_DISABLED;
 
     // Add a new primary config.
     std::unique_ptr<CryptoHandshakeMessage> msg(config_.AddDefaultConfig(
         QuicRandom::GetInstance(), &clock_, config_options_));
 
     // Save the server config.
     scid_hex_ = "#" + QuicUtils::HexEncode(config_peer_.GetPrimaryConfig()->id);
 
     // Encode the QUIC version.
-    ver_hex_ = QuicUtils::TagToString(QuicVersionToQuicTag(GetParam().version));
+    ver_hex_ = QuicTagToString(QuicVersionToQuicTag(GetParam().version));
 
     // Generate a public value.
     char public_value[32];
     memset(public_value, 42, sizeof(public_value));
     pubs_hex_ = "#" + QuicUtils::HexEncode(public_value, sizeof(public_value));
 
     // Generate a client nonce.
     string nonce;
     CryptoUtils::GenerateNonce(
         clock_.WallNow(), QuicRandom::GetInstance(),
@@ skipping 166 matching lines @@
   ASSERT_EQ(StatelessRejector::UNKNOWN, rejector_->state());
   StatelessRejector::Process(std::move(rejector_),
                              base::MakeUnique<ProcessDoneCallback>(this));
 
   EXPECT_EQ(StatelessRejector::ACCEPTED, rejector_->state());
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net