Update from https://crrev.com/306655

net/quic/quic_server.cc

 // Copyright 2014 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/quic_server.h"
 
 #include <string.h>
 
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
@@ skipping 56 matching lines @@
 
   int rc = socket->Listen(address);
   if (rc < 0) {
     LOG(ERROR) << "Listen() failed: " << ErrorToString(rc);
     return rc;
   }
 
   // These send and receive buffer sizes are sized for a single connection,
   // because the default usage of QuicServer is as a test server with one or
   // two clients.  Adjust higher for use with many clients.
-  rc = socket->SetReceiveBufferSize(TcpReceiver::kReceiveWindowTCP);
+  rc = socket->SetReceiveBufferSize(
+      static_cast<int32>(TcpReceiver::kReceiveWindowTCP));
   if (rc < 0) {
     LOG(ERROR) << "SetReceiveBufferSize() failed: " << ErrorToString(rc);
     return rc;
   }
 
   rc = socket->SetSendBufferSize(20 * kMaxPacketSize);
   if (rc < 0) {
     LOG(ERROR) << "SetSendBufferSize() failed: " << ErrorToString(rc);
     return rc;
   }
@@ skipping 75 matching lines @@
     return;
   }
 
   QuicEncryptedPacket packet(read_buffer_->data(), result, false);
   dispatcher_->ProcessPacket(server_address_, client_address_, packet);
 
   StartReading();
 }
 
 }  // namespace net