Misc truncation fixes for gn builds with VS 2015

content/browser/renderer_host/p2p/socket_host_tcp.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 "content/browser/renderer_host/p2p/socket_host_tcp.h"
 
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/sys_byteorder.h"
 #include "content/common/p2p_messages.h"
@@ skipping 504 matching lines @@
   consumed += packet_size;
   return consumed;
 }
 
 void P2PSocketHostTcp::DoSend(const net::IPEndPoint& to,
                               const std::vector<char>& data,
                               const rtc::PacketOptions& options) {
   int size = kPacketHeaderSize + data.size();
   scoped_refptr<net::DrainableIOBuffer> buffer =
       new net::DrainableIOBuffer(new net::IOBuffer(size), size);
-  *reinterpret_cast<uint16*>(buffer->data()) = base::HostToNet16(data.size());
+  *reinterpret_cast<uint16*>(buffer->data()) =
+      base::HostToNet16(static_cast<uint16>(data.size()));
   memcpy(buffer->data() + kPacketHeaderSize, &data[0], data.size());
 
   packet_processing_helpers::ApplyPacketOptions(
       buffer->data() + kPacketHeaderSize,
       buffer->BytesRemaining() - kPacketHeaderSize,
       options, 0);
 
   WriteOrQueue(buffer);
 }
 
@@ skipping 93 matching lines @@
   } else {
     packet_size += kTurnChannelDataHeaderSize;
     // Calculate any padding if present.
     if (packet_size % 4)
       *pad_bytes = 4 - packet_size % 4;
   }
   return packet_size;
 }
 
 }  // namespace content