Add QuicStrCat.

net/quic/core/quic_crypto_client_stream.cc

 // Copyright (c) 2012 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_crypto_client_stream.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/strings/stringprintf.h"
 #include "net/quic/core/crypto/crypto_protocol.h"
 #include "net/quic/core/crypto/crypto_utils.h"
 #include "net/quic/core/crypto/null_encrypter.h"
 #include "net/quic/core/quic_flags.h"
 #include "net/quic/core/quic_packets.h"
 #include "net/quic/core/quic_session.h"
 #include "net/quic/core/quic_utils.h"
 
 using std::string;
 
 namespace net {
 
+const int QuicCryptoClientStream::kMaxClientHellos;
+
 QuicCryptoClientStreamBase::QuicCryptoClientStreamBase(QuicSession* session)
     : QuicCryptoStream(session) {}
 
 QuicCryptoClientStream::ChannelIDSourceCallbackImpl::
     ChannelIDSourceCallbackImpl(QuicCryptoClientStream* stream)
     : stream_(stream) {}
 
 QuicCryptoClientStream::ChannelIDSourceCallbackImpl::
     ~ChannelIDSourceCallbackImpl() {}
 
@@ skipping 235 matching lines @@
     }
     return;
   }
 
   // Send the client hello in plaintext.
   session()->connection()->SetDefaultEncryptionLevel(ENCRYPTION_NONE);
   encryption_established_ = false;
   if (num_client_hellos_ > kMaxClientHellos) {
     CloseConnectionWithDetails(
         QUIC_CRYPTO_TOO_MANY_REJECTS,
-        base::StringPrintf("More than %u rejects", kMaxClientHellos).c_str());
+        QuicStrCat("More than ", kMaxClientHellos, " rejects"));
     return;
   }
   num_client_hellos_++;
 
   CryptoHandshakeMessage out;
   DCHECK(session() != nullptr);
   DCHECK(session()->config() != nullptr);
   // Send all the options, regardless of whether we're sending an
   // inchoate or subsequent hello.
   session()->config()->ToHandshakeMessage(&out);
@@ skipping 376 matching lines @@
   }
   for (size_t i = 0; i < num_their_proof_demands; i++) {
     if (their_proof_demands[i] == kCHID) {
       return true;
     }
   }
   return false;
 }
 
 }  // namespace net