[net/dns] Handle TC bit on DNS response in DnsTransaction.

net/dns/dns_socket_pool.h

Index: net/dns/dns_socket_pool.h
diff --git a/net/dns/dns_socket_pool.h b/net/dns/dns_socket_pool.h
index 54a2edb6f8df1864475e5d3ff05b7acd56e36a71..6bfe474d6a91c9251e6228838e0c46e76bc4dca8 100644
--- a/net/dns/dns_socket_pool.h
+++ b/net/dns/dns_socket_pool.h
@@ -9,6 +9,7 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "net/base/net_export.h"
+#include "net/base/net_log.h"
 
 namespace net {
 
@@ -16,6 +17,7 @@ class ClientSocketFactory;
 class DatagramClientSocket;
 class IPEndPoint;
 class NetLog;
+class StreamSocket;
 
 // A DnsSocketPool is an abstraction layer around a ClientSocketFactory that
 // allows preallocation, reuse, or other strategies to manage sockets connected
@@ -59,6 +61,12 @@ class NET_EXPORT_PRIVATE DnsSocketPool {
       unsigned server_index,
       scoped_ptr<DatagramClientSocket> socket) = 0;
 
+  // Creates a StreamSocket from the factory for a transaction over TCP. These
+  // sockets are not pooled.
+  scoped_ptr<StreamSocket> CreateTCPSocket(
+      unsigned server_index,
+      const NetLog::Source& source);
+
  protected:
   DnsSocketPool(ClientSocketFactory* socket_factory);