Fix Win64 build error.

media/cast/test/transport/transport.cc

 // Copyright 2013 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 "media/cast/test/transport/transport.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 85 matching lines @@
         VLOG(1) << "Drop packet f:" << static_cast<int>(data[12 + 1])
                 << " p:" << static_cast<int>(data[12 + 3])
                 << " m:" << static_cast<int>(data[12 + 5]);
         return true;
       }
     }
     net::TestCompletionCallback callback;
     scoped_refptr<net::WrappedIOBuffer> buffer(
         new net::WrappedIOBuffer(reinterpret_cast<const char*>(data)));
     int rv = udp_socket_->SendTo(
-        buffer.get(), packet.size(), send_address_, callback.callback());
+        buffer.get(), static_cast<int>(packet.size()), send_address_,
+        callback.callback());
     return (rv == packet.size());
   }
 
   virtual bool SendPackets(const PacketList& packets) OVERRIDE {
     bool out_val = true;
     for (size_t i = 0; i < packets.size(); ++i) {
       const Packet& packet = packets[i];
       out_val |= SendPacket(packet);
     }
     return out_val;
@@ skipping 50 matching lines @@
 
 void Transport::SetSendDestination(std::string ip_address, int port) {
   net::IPEndPoint send_address;
   CreateUDPAddress(ip_address, port, &send_address);
   packet_sender_->SetSendAddress(send_address);
 }
 
 }  // namespace test
 }  // namespace cast
 }  // namespace media