Change TCPListenSocket::SendInternal to use a non-blocking implementation.

net/base/tcp_listen_socket.h

Index: net/base/tcp_listen_socket.h
===================================================================
--- net/base/tcp_listen_socket.h	(revision 135347)
+++ net/base/tcp_listen_socket.h	(working copy)
@@ -26,6 +26,8 @@
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/timer.h"
+#include "net/base/backoff_entry.h"
 #include "net/base/listen_socket.h"
 #include "net/base/net_export.h"
 
@@ -101,9 +103,17 @@
   SOCKET socket_;
 
  private:
+  void SendData();
+
   bool reads_paused_;
   bool has_pending_reads_;
+  std::string send_data_;
+  bool send_data_error_;
+  net::BackoffEntry send_data_backoff_;
 
+  // Used to continue sending data asynchronously.
+  base::OneShotTimer<TCPListenSocket> send_timer_;
+
   DISALLOW_COPY_AND_ASSIGN(TCPListenSocket);
 };