Add QuicStrCat.

net/quic/core/quic_client_promised_info_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/quic/core/quic_client_promised_info.h"
 
 #include <memory>
 
 #include "base/macros.h"
 #include "net/quic/core/spdy_utils.h"
 #include "net/quic/platform/api/quic_socket_address.h"
+#include "net/quic/platform/api/quic_str_cat.h"
 #include "net/quic/test_tools/crypto_test_utils.h"
 #include "net/quic/test_tools/quic_client_promised_info_peer.h"
 #include "net/test/gtest_util.h"
 #include "net/tools/quic/quic_client_session.h"
 
 using std::string;
 using testing::StrictMock;
 
 namespace net {
 namespace test {
@@ skipping 281 matching lines @@
   EXPECT_FALSE(delegate.rendezvous_fired());
   EXPECT_EQ(delegate.rendezvous_stream(), nullptr);
 
   // Promise is gone
   EXPECT_EQ(session_.GetPromisedById(promise_id_), nullptr);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net