Allow p2p UDP packages to set DSCP

content/browser/renderer_host/p2p/socket_host_udp.h

Index: content/browser/renderer_host/p2p/socket_host_udp.h
diff --git a/content/browser/renderer_host/p2p/socket_host_udp.h b/content/browser/renderer_host/p2p/socket_host_udp.h
index e9eb36393f4d5fe6c4561999e5ad4fc57b1403a1..22193561f4f302e392bebfd171ed357cc64b72dd 100644
--- a/content/browser/renderer_host/p2p/socket_host_udp.h
+++ b/content/browser/renderer_host/p2p/socket_host_udp.h
@@ -30,7 +30,8 @@ class CONTENT_EXPORT P2PSocketHostUdp : public P2PSocketHost {
   virtual bool Init(const net::IPEndPoint& local_address,
                     const net::IPEndPoint& remote_address) OVERRIDE;
   virtual void Send(const net::IPEndPoint& to,
-                    const std::vector<char>& data) OVERRIDE;
+                    const std::vector<char>& data,
+                    net::DiffServCodePoint dscp) OVERRIDE;
   virtual P2PSocketHost* AcceptIncomingTcpConnection(
       const net::IPEndPoint& remote_address, int id) OVERRIDE;
 
@@ -42,12 +43,14 @@ class CONTENT_EXPORT P2PSocketHostUdp : public P2PSocketHost {
   struct PendingPacket {
     PendingPacket(const net::IPEndPoint& to,
                   const std::vector<char>& content,
-                  uint64 id);
+                  uint64 id,
+                  net::DiffServCodePoint dscp);
     ~PendingPacket();
     net::IPEndPoint to;
     scoped_refptr<net::IOBuffer> data;
     int size;
     uint64 id;
+    net::DiffServCodePoint dscp;
   };
 
   void OnError();
@@ -67,6 +70,7 @@ class CONTENT_EXPORT P2PSocketHostUdp : public P2PSocketHost {
   std::deque<PendingPacket> send_queue_;
   bool send_pending_;
   uint64 send_packet_count_;
+  net::DiffServCodePoint last_dscp_;
 
   // Set of peer for which we have received STUN binding request or
   // response or relay allocation request or response.