This CL adds methods to manipulate RTP header extension, particularly

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/sys_byteorder.h"
 #include "content/common/p2p_messages.h"
 #include "ipc/ipc_sender.h"
 #include "jingle/glue/fake_ssl_client_socket.h"
@@ skipping 500 matching lines @@
     OnError();
     return;
   }
 
   // Add any pad bytes to the total size.
   int size = data.size() + pad_bytes;
 
   scoped_refptr<net::DrainableIOBuffer> buffer =
       new net::DrainableIOBuffer(new net::IOBuffer(size), size);
   memcpy(buffer->data(), &data[0], data.size());
+  MaybeUpdateRtpSendTimeExtn(&*data.begin(), data.size());

[juberti2, 2014/02/14 01:53:27]

think you need to do this before the memcpy

[Solis, 2014/02/14 10:05:29]

Avoid implicitly returning an iterator by using: &data[0]

 
   if (pad_bytes) {
     char padding[4] = {0};
     DCHECK_LE(pad_bytes, 4);
     memcpy(buffer->data() + data.size(), padding, pad_bytes);
   }
   WriteOrQueue(buffer);
 }
 
 int P2PSocketHostStunTcp::GetExpectedPacketSize(
@@ skipping 13 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