Revert 72421 (broke tests) - Enable TCP Keep-Alive packets for Windows.

45s until first TCP Keep-Alive and 45s in between keep alives.

BUG=27400
TEST=Run Wireshark, make sure TCP Keep-Alive packets are sent.

Review URL: http://codereview.chromium.org/6300013

TBR=willchan@chromium.org
Review URL: http://codereview.chromium.org/6371010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72426 0039d316-1c4b-4281-b951-d872f2087c98

net/socket/tcp_client_socket_win.cc

@@ -4,8 +4,6 @@
 
 #include "net/socket/tcp_client_socket_win.h"
 
-#include <mstcpip.h>
-
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory_debug.h"
@@ -733,27 +731,10 @@ int TCPClientSocketWin::SetupSocket() {
   //    http://technet.microsoft.com/en-us/library/bb726981.aspx
   const BOOL kDisableNagle = TRUE;
   int rv = setsockopt(socket_, IPPROTO_TCP, TCP_NODELAY,
-                      reinterpret_cast<const char*>(&kDisableNagle),
-                      sizeof(kDisableNagle));
+      reinterpret_cast<const char*>(&kDisableNagle), sizeof(kDisableNagle));
   DCHECK(!rv) << "Could not disable nagle";
 
-  // Enable TCP Keep-Alive to prevent NAT routers from timing out TCP
-  // connections. See http://crbug.com/27400 for details.
-
-  struct tcp_keepalive keepalive_vals = {
-    1, // TCP keep-alive on.
-    45000,  // Wait 45s until sending first TCP keep-alive packet.
-    45000,  // Wait 45s between sending TCP keep-alive packets.
-  };
-  DWORD bytes_returned = 0xABAB;
-  rv = WSAIoctl(socket_, SIO_KEEPALIVE_VALS, &keepalive_vals,
-                sizeof(keepalive_vals), NULL, 0,
-                &bytes_returned, NULL, NULL);
-  DCHECK_EQ(0u, bytes_returned);
-  DCHECK(!rv) << "Could not enable TCP Keep-Alive for socket: " << socket_
-              << " [error: " << WSAGetLastError() << "].";
-
-  // Disregard any failure in disabling nagle or enabling TCP Keep-Alive.
+  // Disregard any failure in disabling nagle.
   return 0;
 }