Wire up rtc_packet_ids to P2PSocketHostTcp, which is required for correct BWE in WebRTC.

content/browser/renderer_host/p2p/socket_host_tcp.h

Index: content/browser/renderer_host/p2p/socket_host_tcp.h
diff --git a/content/browser/renderer_host/p2p/socket_host_tcp.h b/content/browser/renderer_host/p2p/socket_host_tcp.h
index a7771c9871ef07d7353a152f915358df24f3bad9..998f83f800fdd9a8059decb6ac7be808c4e6a36e 100644
--- a/content/browser/renderer_host/p2p/socket_host_tcp.h
+++ b/content/browser/renderer_host/p2p/socket_host_tcp.h
@@ -30,6 +30,8 @@ namespace content {
 
 class CONTENT_EXPORT P2PSocketHostTcpBase : public P2PSocketHost {
  public:

[Taylor_Brandstetter, 2017/04/25 21:34:19]

Could add a comment that the uint64_t is the packet ID. Also, does this need to
be public?

[Stefan, 2017/04/26 09:02:39]

More self explanatory now that I've made this a struct.

+  typedef std::pair<uint64_t, scoped_refptr<net::DrainableIOBuffer>> SendBuffer;

[Sergey Ulanov, 2017/04/26 00:11:52]

I think it would be better to replace this with a struct. Also does it need to
be public?

[Stefan, 2017/04/26 09:02:39]

Done.

+
   P2PSocketHostTcpBase(IPC::Sender* message_sender,
                        int socket_id,
                        P2PSocketType type,
@@ -60,7 +62,7 @@ class CONTENT_EXPORT P2PSocketHostTcpBase : public P2PSocketHost {
                       const std::vector<char>& data,
                       const rtc::PacketOptions& options) = 0;
 
-  void WriteOrQueue(scoped_refptr<net::DrainableIOBuffer>& buffer);
+  void WriteOrQueue(SendBuffer& buffer);
   void OnPacket(const std::vector<char>& data);
   void OnError();
 
@@ -91,8 +93,8 @@ class CONTENT_EXPORT P2PSocketHostTcpBase : public P2PSocketHost {
 
   std::unique_ptr<net::StreamSocket> socket_;
   scoped_refptr<net::GrowableIOBuffer> read_buffer_;
-  std::queue<scoped_refptr<net::DrainableIOBuffer> > write_queue_;
-  scoped_refptr<net::DrainableIOBuffer> write_buffer_;
+  std::queue<SendBuffer> write_queue_;
+  SendBuffer write_buffer_;
 
   bool write_pending_;