Add QuicStrCat.

net/quic/core/quic_session.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_session.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "net/quic/core/crypto/proof_verifier.h"
@@ skipping 658 matching lines @@
       (stream_id - largest_peer_created_stream_id_) / 2 - 1;
   size_t new_num_available_streams =
       GetNumAvailableStreams() + additional_available_streams;
   if (new_num_available_streams > MaxAvailableStreams()) {
     DVLOG(1) << ENDPOINT
              << "Failed to create a new incoming stream with id:" << stream_id
              << ".  There are already " << GetNumAvailableStreams()
              << " streams available, which would become "
              << new_num_available_streams << ", which exceeds the limit "
              << MaxAvailableStreams() << ".";
-    string details = IntToString(new_num_available_streams) + " above " +
-                     IntToString(MaxAvailableStreams());
     connection()->CloseConnection(
-        QUIC_TOO_MANY_AVAILABLE_STREAMS, details.c_str(),
+        QUIC_TOO_MANY_AVAILABLE_STREAMS,
+        QuicStrCat(new_num_available_streams, " above ", MaxAvailableStreams()),
         ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
     return false;
   }
   for (QuicStreamId id = largest_peer_created_stream_id_ + 2; id < stream_id;
        id += 2) {
     available_streams_.insert(id);
   }
   largest_peer_created_stream_id_ = stream_id;
 
   return true;
@@ skipping 166 matching lines @@
 
 size_t QuicSession::MaxAvailableStreams() const {
   return max_open_incoming_streams_ * kMaxAvailableStreamsMultiplier;
 }
 
 bool QuicSession::IsIncomingStream(QuicStreamId id) const {
   return id % 2 != next_outgoing_stream_id_ % 2;
 }
 
 }  // namespace net